JP3454364B2 - DC motor power supply circuit - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric fishing reel.
To a power supply circuit for a DC motor. 2. Description of the Related Art The characteristics of a general DC motor (hereinafter referred to as a motor) used in a conventional electric reel for fishing are as follows.
It is as follows. When the duty ratio of the current supplied to the motor is increased, the rotation speed is increased and the rotation torque is decreased. When a load equal to or greater than the rotation torque regulated by the rated voltage of the motor is applied to the motor (such as the tension of the fishing line when the fishing line is wound), the load current to the motor increases. If the state where the load current is increased is continued for a long time, the motor is overheated and burnt out. Therefore, when the rising state of the load current is detected, the duty ratio of the current supplied to the motor is reduced to prevent burning. When the duty ratio of the current supplied to the motor is reduced, the rotation speed is reduced and the rotation torque is increased. When the rotation torque increases and the load of the rotation torque decreases regulated by the rated voltage of the motor, the load radio wave applied to the motor decreases and the heating and burning of the motor is prevented. In order to control the rotation speed of the electric fishing reel by using a motor having such characteristics, depending on whether the fish is hooked, the type of the fishing fish, the weight of the weight, and the like. Various DC motor power supply circuits have been proposed. [0004] Proposal 1 is a proposal of the present applicant,
For example, when winding the thread when the fish is not hooked on the fishhook, the back electromotive force stored in the boosting coil is superimposed on the normal battery voltage, so that the rated voltage of the motor (maximum value, for example, This is a proposal in which a voltage (for example, 14 V) or higher is applied to the motor to rotate the motor at a high speed and a high torque so that the yarn can be wound efficiently (see Japanese Utility Model Application Laid-Open No. Hei 4-94).
No. 98885). Even if a voltage higher than the rated voltage is applied to the motor (for example, 14V), if the excess voltage is relatively low and the load on the motor due to the tension of the fishing line when winding the fishing line is light, the motor may overheat. There is no danger. [0005] Proposal 2 is to select an optimum voltage from a plurality of power supply voltages prepared, for example, in the case of winding a thread with no fish hooked on a fish needle or a light load.
Rotate the motor at the optimum rotation speed, wind the yarn efficiently, set the load current value to a single predetermined motor, and check if the load current detection value to the motor exceeds this value. (Japanese Utility Model Laid-Open No. 3-91775). [0006] However, the second proposal is to switch the rotation speed of the motor depending on whether the load current value to the motor exceeds a single load current value. In addition, the rotation speed of the motor, that is, the winding speed of the fishing line is frequently changed, which may not only give the angler discomfort due to the shock at the time of switching, but also change the rotation speed of the fishing line every time the rotation speed of the motor changes. Since the tension, that is, the winding force of the fishing line on the spool is different, the fishing line wound on the spool may be distorted and may be irregularly wound. Therefore, the present invention has been made to solve the above-mentioned problem, and has been made in consideration of a detection value of a load state on a motor.
In addition to reducing the frequency of switching the rotation speed of the motor in the electric fishing reel which automatically switches between high speed and low speed to prevent burnout of the motor, so as not to give a fisherman discomfort, It is an object of the present invention to provide a DC motor power supply circuit which prevents troubles such as irregular winding of fishing line wound around a spool. [0008] In order to solve the above-mentioned problems, the present invention changes the rotation speed of the DC motor by changing the voltage or the duty ratio of the supply current between the terminals of the DC motor. the as allowed to rotate is switched to two stages of high-speed rotation and low-speed normal speed rotation, the current detecting section for detecting a load current to the DC motor, previously storing a predetermined load current value for the direct current motor Storage unit, and the detection value detected by the current detection unit and stored in the storage unit
Comparing the predetermined load current value, the detected value is a predetermined load
If the current value is exceeded, the normal speed
Allowed switched driven, the detection value is conductive for the case of less than the predetermined load current value fishing and a control unit for controlling so allowed to <br/> drive is switched to high speed from the normal speed rotation
In the power supply circuit for a DC motor in the dynamic reel, the
The maximum and minimum values, which have a predetermined width in the storage unit, are recorded.
Remember, the control value of the control unit is the detection value.
When the value exceeds the maximum value, the high speed rotation is changed to the normal speed rotation.
If the detection value is less than the minimum value,
Switching from the normal speed rotation to high speed rotation and driving,
If the detected value is between the maximum value and the minimum value,
It is intended to maintain the drive of. The load current value based on the load on the motor is detected by a current detection unit. The current value detected by said current detecting unit, when becomes rather larger than the stored maximum value in the storage unit <br/>, the control unit so as to supply a current to reduce the voltage or the duty ratio to the motor To control. This current supply causes the motor to rotate at low speed. And the current detection
The current value detected by the unit is equal to the maximum value stored in the storage unit.
If the value falls below the value, the control unit
Continue supplying the reduced current to the motor,
Keep spinning. Then , the current value detected by the current detection unit is smaller than the minimum value stored in the storage unit.
When it becomes low, the control unit controls so as to supply the voltage or the current with the increased duty ratio to the motor. By this current supply, the motor rotates at high speed. And the
The current value detected by the current detection unit is stored in the storage unit.
If the maximum value is exceeded, the control unit
Continues to supply the motor with the increased duty ratio to the motor,
Continue to maintain high-speed rotation of the motor. [0010] The difference between the maximum value and the minimum value of the storage unit is increased as , for example, 10A and 5A.
The speed change is not performed frequently, giving the angler discomfort.
Turbulence of the fishing line wound around the spool
And other troubles can be prevented. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 shows a power supply circuit S for a DC motor according to an embodiment of the present invention.
2 and 3 are flow charts showing the operation of the embodiment. As shown in FIG. 1, a power supply circuit S includes a battery 3
A motor driving unit D including a motor and a motor 7;
And a motor speed controller C including a current value detector 25 and the like. First, the configuration of the motor driving section D will be described. Step-up coil 1 and switching element 1F
A series circuit with ET2 is connected in parallel to a 12V battery 3 such as a rechargeable nickel-cadmium battery, and the negative electrode of the battery 3 is grounded. Both ends Q and P of the coil 1 have first and second diodes 4 for regulating the current direction.
The anodes of the diodes 4 and 5 are connected to the positive terminal of a current regulating capacitor 6 and to one terminal of a motor 7. The negative terminal of the capacitor 6 is grounded, and the other terminal of the motor 7 is a second FE which is a switching element.
Grounded via T8. In order to control the rotation speed of the motor 7, the voltage between its terminals may be controlled. The gates of the first and second FETs 2 and 8 are connected to the motor speed controller C via terminals 9 and 11, respectively.
, The first and second output terminals 24 of the changeover switch 24
a, 24b. Next, the configuration of the motor speed control section C will be described. The control unit 21 composed of a microcomputer or the like has a maximum value of the load current to the motor 7 (for example, 10 A).
And the ROM in which the minimum value (for example, 5A) is stored
A command input unit 23 having a normal speed switch 23a and a high speed switch 23b for instructing a normal speed rotation, a high speed rotation, and the like of the motor 7;
A changeover switch 24 for switching between high-speed rotations and an output unit 25a of a current value detection unit 25 provided in the motor 7 and detecting a load current to the motor 7 are connected. The current detecting section 25 is composed of a DC resistor having a low resistance. Next, the operation of the power supply circuit S is set to low.
The description will be made separately for high- speed normal-speed rotation (FIG. 2) and high-speed rotation (FIG. 3). First, normal speed rotation Nitsu shown in FIG. 2
In this case, for example, the fish is caught and the fishing line is wound by normal rotation when a load is applied to the motor, and the rotation speed of the motor is low. As shown in FIG. 2, when the normal speed switch 23a of the instruction input unit 23 is depressed (step S1), a motor drive signal M1 is output from the second terminal 24b of the changeover switch 24 via the control unit 21. (Step S2).
Then, the second FET 8 is turned on, and the current flows through the diode 4
And flows to the motor 7 through the path indicated by the symbol A. In this case, the voltage between the terminals of the current value detection unit 25 and the motor 7 is
If the loss in the middle is ignored, the DC voltage of the battery 3 (for example, 1
2V). Therefore, the motor 7 is rotated at the normal speed at the motor rating (12 V in this case) (step S
3). Next, the high-speed rotation shown in FIG. 3 will be described.
Then, in this case, for example, fish cannot be caught, bait change, etc.
This is a case in which the reeled-out yarn is wound at a high speed in order to perform the operation , and the rotation speed of the motor is high. As shown in FIG. 3, when the high-speed switch 23b of the instruction input unit 23 is pressed (step S11), a motor drive signal M1 is output from the second terminal 24b of the changeover switch 24 via the control unit 21 (step S11). S12) The second FET 8 is turned on, and first flows to the motor 7 through the path indicated by the symbol A. In this case, the motor 7 is rotated at the set maximum voltage (in this case, 12 V) at the normal speed as described above (step S13). Further, when the boost instruction signal U1 is output from the first terminal 24a of the changeover switch 24 via the control unit 21 (step S14), the first FET 2
Is turned on and a current flows through the boosting coil 1 (step S
15), a counter electromotive force (for example, 2 V) is applied to the step-up coil 1
Is generated. In this case, the voltage at the point P becomes 2 V, and the current is supplied to the motor
Flows to Therefore, if the loss in the middle is ignored, the voltage 2V at the point P is superimposed on the voltage 12V at the point Q, and
Since V is applied, the motor 7 is rotated at a high speed (step S16). At this time, the load current flowing through the motor 7 is detected by the current value detection unit 25. Note that this high-speed rotation
In this state, it is desirable that the fishing line is not under tension, such as when no fish is hooked. The detected load current value (for example, 8 A) is compared with the maximum value (for example , 10 A) stored in the storage unit 22 (step S17), and the detected load current value is the maximum value. If it is smaller (step S17; NO), the process returns to step S14, and the current is maintained while maintaining the path indicated by the symbol B.
Is supplied to the motor 7, and the high-speed rotation of the motor 7 is continued (S14 to S17; NO). If this operation is schematically shown, it corresponds to the portion of “continue boosting” in FIG. 4A. In addition, fish caught in this high-speed rotation.
In step S17, if the detected load current value (for example, 12A) is larger than the maximum value (10A) (step S17; YES), the first of the changeover switches 24 via the control unit 21 is controlled. The boosting release signal U2 is output from the terminal 24a (step S18), and the first FET 2 is turned off, so that the energization of the boosting coil 1 through the path indicated by the symbol B is blocked (step S19). As a result, the voltage of the path indicated by the symbol A (that is, 12 V) is applied to the motor 7, and the motor 7 rotates normally (step S20). Further, the load current detection value (for example, 4 A) at that time is the minimum value.
(E.g. , 5A), and if the detected load current value is smaller than the minimum value, the process returns to step S14 (step S21; YES), a boosting instruction is issued again , and the current is reduced.
The path is switched to the path indicated by B and supplied to the motor 7,
The motor 7 is rotated at a high speed. In FIG. 4, [4A
In "supply high voltage"]. Further, the load current detection value in step 21 (e.g., 8A) in is larger than the minimum value (Step S21; NO), returns to step S18, is still continued boosting release signal, the motor 7 Is the sign A
(Ie, 12V) is applied, and the motor 7
We continue normal rotation. In FIG. 4 described above, the portion of “Continue boost cancellation in 8A” corresponds. That is, in FIG. 4, when the load current exceeds the maximum value (10 A) (for example, 12 A),
A low voltage (12V) is supplied to the motor 7 to make it rotate normally. If the load current is less than the minimum value (5A) (for example, 4A), a high voltage (14V) is supplied to the motor 7 to rotate at high speed. Sneak up. If the current value is between the maximum value and the minimum value (for example, 8 A), the boosting operation (steps S13 to S17) or the boosting release operation (steps S18 to S21) is continued. In this way, rolling of the boat and eating of fish during high-speed rotation (14 V) without fish
Load current detection value takes an excessive load due to Hitoshi Itsuki is the most
When the maximum value exceeds 10A, the supply voltage value to the motor is automatically reduced to 12V, and normal operation is performed. Thereafter, the excessive load is eliminated, and the load current detection value is reduced to the maximum value of 10A or less.
Even if it drops, the supply voltage value to the motor is reduced to 12V.
When the normal operation is continued and the detected load current value to the motor becomes 5A or less , the supply voltage to the motor is automatically reduced to 14A.
V and rotate at high speed. Also, the load current detection value is
After switching to high-speed rotation with a small value of 5A or less, load current
Supply voltage to the motor even when the detected value exceeds the minimum value 5A
High-speed rotation with the voltage increased to 14V is continued to
Supply to the motor only when the output value exceeds the maximum value of 10A
Switch to normal operation with the voltage value reduced to 12V. The maximum value (10A) and the minimum value (5A)
If the difference between them is made large, the speed switching is not performed frequently, the shock accompanying the switching is small, and the angler does not frequently feel uncomfortable. Further, since the continuous switching is not frequently performed, the winding force of the fishing line on the spool does not change so frequently that the fishing line wound on the spool is prevented from being broken. In this embodiment, a boosting coil is connected in parallel to one DC power supply so that high-voltage and low-voltage currents can be applied to the motor. However, as described in the related art described above, The changeover switch 24 may be connected to a speed change switch element having different duty ratios, and a plurality of batteries may be prepared so that the output voltage can be switched so that high voltage and low voltage may be applied. It is. As described above, according to the present invention, the maximum value and the minimum value of the load current detection value to the motor are stored, and the actual current detected by the current value detection unit is stored. The value is compared with the stored value, and when the value exceeds the maximum value , the supply is switched to the current that rotates the motor at a low speed, and the current is detected by the current value detection unit.
The low-speed rotation is continued until the current value
Switching the supply to the current current at a high speed rotation of the motor into play <br/> if the current value falls below the minimum value detected by the current values detector
Until the current value detected by the current value detector reaches the maximum value.
In since the controlled so that to continue the high-speed rotation, for example when the load current to the load is light motor to the motor is small, automatically by applying a current to a high speed rotation of the motor to the motor, the motor Can be rotated at high speed. Further, since the frequency of switching the rotation speed of the motor can be reduced, not only can comfortable fishing be performed, but also troubles such as irregular winding of the spool with the fishing line can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2 is an operation flowchart in the case of normal rotation in the embodiment. FIG. 3 is an operation flowchart in the case of high-speed rotation in the embodiment. FIG. 4 is a diagram schematically showing an operation flowchart shown in FIG. 3; [Description of Signs] A: 12 V application path B: 2 V superposition application path C: motor speed control unit D: motor drive unit S: power supply circuit 1: boosting coil 2, 8 ... switching FET 3 ... battery 7 ... DC motor 21 ... control unit 22 ... storage unit 23 ... instruction input unit 23a ... normal speed switch 23b ... high speed switch 24 ... changeover switch 25 ... current value detection unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02P 5/00-5/26 H02P ⁷ /00-7/34 H02K 23/66

Claims (1)

(57) [Claim 1] The rotation speed of the DC motor is changed between a high speed rotation and a low speed normal speed rotation by changing a voltage or a duty ratio of a supply current between terminals of the DC motor. as allowed to rotate is switched to two stages of the current detector for detecting a load current to the DC motor, and a storage unit for previously storing a predetermined load current value to the DC motor, the current detection unit And the detected value detected in the storage unit
Comparing the predetermined load current value, the detected value is a predetermined load
If the current value is exceeded, the normal speed
Allowed switched driven, the detection value is conductive for the case of less than the predetermined load current value fishing and a control unit for controlling so allowed to <br/> drive is switched to high speed from the normal speed rotation
In the power supply circuit of the DC motor in the moving reel,
The maximum and minimum values, which have a predetermined width in the storage unit, are recorded.
Remember, the control value of the control unit is the detection value.
When the value exceeds the maximum value, the high speed rotation is changed to the normal speed rotation.
If the detection value is less than the minimum value,
Switching from the normal speed rotation to high speed rotation and driving,
If the detected value is between the maximum value and the minimum value,
Characterized by maintaining the driving of the fish
Power supply circuit for DC motor in moving reel .