JPS5822704B2 - pulse converter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pulse converter that separately transmits the amount of power transmitted and the amount of received power, and particularly relates to a pulse converter suitable for use in sectors with frequent power flows.

In the conventional power transmission and reception system, as shown in Fig. 1, the amount of power transmitted and the amount of power received are determined by the power meters 1,
A rotor (not shown) is provided with a reverse rotation prevention device and a forward rotation prevention device (not shown) to stop the power meter 1 on the power receiving side from rotating in reverse when transmitting power, and to prevent the power meter 1 on the power transmitting side when receiving power. It is configured to send a signal proportional to the amount of power transmitted/received to each pulse converter 2, 2 by a method of stopping reverse rotation of the converter 2, and send out a pulse converted in proportion to the amount of power.

However, this type of system configuration requires two wattmeters with transmitting devices that have reverse rotation prevention devices and two pulse converters that convert the pulse frequency, which requires installation space and cost. becomes large,
In addition, the reverse rotation prevention device installed on the rotor of the electricity meter is
Since the accuracy is sufficient to prevent reverse rotation of 1/2 rotation or more, the signal transmitted within 1 or 1/2 rotation of the rotor is used for power transmission and for one power flow. The problem is that there is an error that is measured on both sides of the power receiving system, and this error is accumulated depending on the frequency of the power flow.

The present invention has been made to solve these conventional problems, and its object is to provide a pulse converter that requires less installation space and cost, and that can reduce measurement errors and improve accuracy. is to provide.

In order to achieve the purpose of this invention, the present invention provides a step of rotating forward or backward in response to a forward or reverse pulse from a power meter with a transmitting device that rotates forward or backward in proportion to the amount of power transmitted or received. a motor, a planetary gear rotatably disposed on a second shaft fixed perpendicularly to the first shaft driven by the step motor in forward and reverse rotations, and a planetary gear on the first shaft; are arranged opposite to each other on both sides, sandwiching the planetary gear so as to be rotatable;
first and second crown gears that mesh with the planetary gears, a mechanism that allows the first crown gear to rotate in the normal direction and prevents it from rotating in the opposite direction; a blocking mechanism, and a first mechanism provided on each of the crown gears.
and a second transmission mechanism, and first and second pulse transmitters that are respectively provided in each transmission mechanism and transmit pulses proportional to the number of rotations of each transmission mechanism as power transmission/reception amount signals. This is a configuration of a characteristic pulse converter.

The present invention will be explained below based on an embodiment shown in FIGS. 2 to 6.

FIG. 2 shows the configuration of the power transmission/reception system according to the present invention, and in the figure, 11 is a power meter with a transmitting device.

A power transformer PT and a current transformer CT provided on a main line (not shown) are respectively connected to this watt-hour meter 11, and when the main line is transmitting power, the watt-hour meter 11 rotates in the normal direction. It is configured to transmit forward rotation pulses from the rear, and to transmit reverse rotation pulses while rotating in reverse when power is being received.

The forward and reverse pulses are then guided to the step motor 13 of the pulse converter 12, as shown in FIGS. 2 and 3, and the step motor 13 is configured to rotate in accordance with the forward and reverse pulses. .

A gear 14 is fixed to the rotating shaft of the step motor 13,
This gear 14 is meshed with a gear 16 fixed to a shaft 15.

As shown in FIG. 4, a cylindrical metal fitting 17 is provided around the shaft 15 and fixed thereto via a screw 18.

A shaft 19 that is perpendicular to the shaft 15 is protruded at a required position on the circumferential surface of the metal fitting 170, and a freely rotating planetary gear 20 is attached to the tip of the shaft 19.

Bubs 2L and 22 are rotatably provided on the shaft 15 on both sides of the shaft 15 via the metal fittings 17, as shown in FIG. Axial movement is restricted by collars 23 and 24, respectively.

A spacer 25 is provided between the metal fitting 17 and the bulbs 21 and 22.
26 are interposed respectively.

Bubs 21 formed symmetrically with each other via metal fittings 17
．． 22, from the metal fitting 17 side toward the collar 2324, crown gears 27, 28, spur gears 29° 30, and model wheel 3L.
32 are provided around each other, and the mutual crown gears 27 and 28 are
They are connected via the planetary gear 20.

On the other hand, the mold wheels 31 and 32 have teeth formed in mutually opposite directions as shown in FIGS.
32 are engaged with pawls 35 and 36, which are biased in the engagement direction by springs 33 and 34, respectively.

When the mold wheel 31 rotates in the direction of the arrow shown in FIG. 5ν, a force is applied to the mold wheel 32 in the direction of the arrow shown in FIG. A force in the opposite direction of the arrow is applied to the mold wheel 31, and one of the mold wheels 31 and 32
When rotating, the mold wheels 32 or 31 on all sides are configured to remain completely stopped.

As shown in FIGS. 3 and 4, the spur gears 29 and 30 include a gear mechanism 37 composed of a large number of moving gears.
．． 38 are connected to each other.

ν Each of the gear mechanisms 37 and 38 has a mutually independent transmission mechanism, and between the spur gear 29 and the shaft 39 and between the spur gear 3
The structure is such that an arbitrary conversion ratio can be created between 0 and the axis 40.

The shaft 39.40 has a universal joint 41 as shown in FIG.
．． Shafts 43, 44 are connected via 42, respectively.

Signal discs 45, 46 are fixed to each of the shafts 43, 44, and near each signal disc 45, 46 there is a pulse transmitter that determines the notch in the signal disc 45, 46 and transmits a pulse signal. 147 and 48 are respectively arranged.

Next, the operation of the pulse converter having the above configuration will be explained.

When a certain main line is transmitting power, a normal pulse proportional to the amount of transmitted power is transmitted from the wattmeter 11 to 1,
When power is being received, a reverse pulse proportional to the amount of power received is transmitted from the power meter 11.

These forward and reverse pulses cause the step motor 13 to rotate in forward and reverse directions.

The rotational force of the step monitor 130 is then applied to the gear 14.
, 16, the shaft 19 is connected to the shaft 15 via the shaft 15 and the metal fitting 17.
Rotate it around.

A free-rotating planetary gear 20 provided at the tip of the shaft 19 is meshed with mutually opposing crown gears 27, 28, so that the rotational force of the shaft 15 can be transmitted to both.

The bub 2L 22 that fixes the crown gears 27 and 28 is attached to the shaft 15.
The model wheel 31 can rotate in the reverse direction (power receiving direction).
The model wheel 32 can rotate in the forward direction (power transmission direction), but cannot rotate in the forward direction (power transmission direction), and the mold wheel 32 can rotate in the forward direction, but cannot rotate in the reverse direction.

For this reason, for example, in response to a reverse pulse when receiving power, the shaft 15
is reversed, the mold wheel 32 is stopped and the planetary gear 20
performs a revolution movement in which it moves on the crown gear 28 while rotating on its axis.

At this time, the crown gear 27 that meshes with the planetary gear 20 rotates in response to the rotation and revolution of the planetary gear 20, so the speed is doubled.

Since the mold wheel 31 at this time can rotate in the reverse direction,
The spur gear 29 is rotated via the pulley 21 that is integrated with the model wheel 31, and after any conversion is performed in the gear mechanism 37, the shaft 43 is rotated to transmit a pulse signal for power reception from the pulse transmitter 47. is sent.

On the other hand, since the mold wheel 32 is stopped, the spur gear 30 integrated therewith does not rotate, and the signal disc 46 connected via the gear mechanism 38 also does not rotate, causing no signal from the pulse generator 48. is not transmitted.

When the shaft 15 rotates in the normal direction (during power transmission), the signal disk 46 rotates in the opposite direction to the above, and the pulse transmitter 48 transmits an oscillation pulse signal for power transmission, and the pulse transmitter 47 does not transmit a signal. .

As explained above, this embodiment provides the following effects.

(1) The power transmission system can be configured and installed with a single watt-hour meter and a single pulse converter.

It is possible to reduce space and costs.

(2) It follows the signal sent at 1/8 rotation of the watt-hour meter to determine whether it is normal or reverse, and furthermore, the rotation angle of the step motor is expanded by the planetary gear mechanism and the rotation is controlled by the model wheel and pawl. , the measurement error during tidal current can be reduced to about 1/10 of that of the conventional method, making it effective for use in sectors where tidal current is frequent.

Note that the stop position of the mold car when switching from power transmission to power reception is arbitrary, and the moving angle of the mold car from this arbitrary position to the stop position appears as an error.

However, by utilizing the double speed theory of the planetary gear mechanism, the rotation angle of the step motor can be expanded to the rotation angle of the mold wheel, and the error can be reduced without increasing the number of teeth of the mold wheel.

(3) The amount of power transmitted and the amount of received power on a certain trunk line can be transmitted separately at different conversion ratios.

The present invention has been described above based on preferred embodiments, but according to the present invention, it is possible to reduce installation space and costs, reduce measurement errors, and improve accuracy.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a conventional power transmission and reception system, FIG. 2 is a block diagram showing a power transmission and reception system according to the present invention, FIG. 3 is a perspective view showing an embodiment of the present invention, and FIG. Figure 3 is an enlarged sectional view of the mounting part, Figure 5 is a view taken from the line ■-■ in Figure 4, and Figure 6 is
The figure is a view taken from the line ■-■ in FIG. 4. 11... Electric energy meter, 12... Pulse converter, 13.
...Step motor, 20...Planetary gear, 21.22
...bub, 27.28...crown gear, 29.30...
- Spur gear, 3L 32... Model wheel, 35.36... Pawl, 37.38... Gear mechanism, 45.46... Signal disk, 47.48... Pulse transmitter.

Claims (1)

[Scope of Claims] 1a. In response to a forward or reverse pulse from a power meter with a transmission station, which rotates forward or backward in proportion to the amount of power transmitted or received,
With a step motor that rotates in reverse. b. A planetary gear rotatably disposed on a second shaft fixed perpendicularly to the first shaft which is driven to rotate in forward and reverse directions by the step motor. C6 first and second crown gears that are rotatably placed on the first shaft to sandwich the planetary gear and are opposed to each other and mesh with the planetary gear, respectively; e) a mechanism that allows the second crown gear to rotate in reverse and prevents it from rotating in the normal direction; a transmission mechanism; g. first and second pulse transmitters, which are respectively installed in each transmission mechanism and transmit pulses proportional to the rotational speed of each transmission mechanism as power transmission/reception amount signals; A pulse converter characterized by: