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Electromagnetic operating mechanism drive circuit

A driving circuit, electromagnetic operation technology, applied in the direction of circuits, relays, electrical switches, etc., can solve the problems of cutting off the current, consumption, and protective switching elements when the drive is not cut off.

Active Publication Date: 2020-04-24
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the energy stored in the closing capacitor is consumed until it becomes zero
Since the energy stored in the closing capacitor is close to zero, the current flowing through the closing driving coil is also close to zero, and the protective switching element that does not have the ability to cut off the current during driving may also be cut off.

Method used

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  • Electromagnetic operating mechanism drive circuit
  • Electromagnetic operating mechanism drive circuit
  • Electromagnetic operating mechanism drive circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0023] figure 1 It is a circuit diagram showing the configuration of the drive circuit of the electromagnetic operating mechanism according to Embodiment 1, figure 2 is a timing chart for explaining the closing operation, image 3 This is a timing chart for explaining pole-opening operation.

[0024] First, use figure 1 Next, the configuration of the driving circuit of the electromagnetic operating mechanism according to the first embodiment, for example, the configuration in the case of switching the vacuum valve of the vacuum circuit breaker will be described. The driving circuit of the electromagnetic operating mechanism is composed of: a movable iron core 1 that switches the switch contact of the vacuum valve; a closed pole driving coil 2 that excites and drives (moves) the movable iron core 1; 2. A closed electrode capacitor 4 for power supply; a closed electrode drive switching element 5 for controlling the power supply from the closed electrode capacitor 4 to the cl...

Embodiment approach 2

[0033] Figure 4 It is a circuit diagram showing the configuration of the driving circuit of the electromagnetic operating mechanism according to the second embodiment. and figure 1 The circuit diagram showing the configuration of the driving circuit of the electromagnetic operating mechanism according to Embodiment 1 is different in that a resistor 11 is provided in parallel to the series circuit of the protective relay 7 and the diode 8 . About other structures, since it is the same as Embodiment 1, description is abbreviate|omitted.

[0034] Next, refer to Figure 4 The drive circuit shown will describe the operation of the drive circuit of the electromagnetic operating mechanism according to the second embodiment.

[0035] In the case before the closing operation starts, it is connected via the path from the closing capacitor 4 to the closing drive coil 2, the resistor 11, the diode 9, the discharge resistor 10c, and the closing side voltage detection circuit 13, and th...

Embodiment approach 3

[0038] Figure 5 It is a circuit diagram showing the configuration of the driving circuit of the electromagnetic operating mechanism according to the third embodiment. and figure 1 The difference between the shown circuit diagram showing the configuration of the drive circuit of the electromagnetic operating mechanism according to Embodiment 1 is that the opening-side ring circuit switching element 16 and the opening-driving switching element 15 are respectively provided with opening-side voltage detection. A circuit 23, and a switching element voltage detection circuit 24 for driving an opening. About other structures, since it is the same as Embodiment 1, description is abbreviate|omitted.

[0039] Next, refer to Figure 5 The drive circuit shown and image 3 The timing chart of the pole-opening operation shown is to describe the operation of the drive circuit of the electromagnetic operating mechanism according to the third embodiment.

[0040] In addition, the normal ...

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PUM

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Abstract

This electromagnetic operation mechanism drive circuit is constituted by: a movable core (1); a driving coil for contact closing (2) driving the movable core (1); a capacitor for contact closing (4) supplying power to the driving coil for contact closing (2); a driving switch element for contact closing (5) controlling the supply of power to the driving coil for contact closing (2); a protection relay (7) provided between the driving switch element for contact closing (5) and the driving coil for contact closing (2); a overvoltage suppression unit on the contact closing side connected in parallel to the driving switch element for contact closing (5) and configured so that a loop circuit switch element on the contact closing side (6) is connected in series to a loop circuit on the contact closing side (10); and a voltage detection circuit on the contact closing side (13) detecting the voltage of the loop circuit switch element on the contact closing side (6). In this manner, even if a switch element of a overvoltage suppression unit on the contact closing side in a drive circuit for switching on and off electric power equipment is suffering from an open circuit failure, the interruption operation of the protection switch element can be stopped so that the contact closing operation can be completed safely.

Description

technical field [0001] The present invention relates to, for example, a driving circuit for an electromagnetic operating mechanism that includes a protection circuit in a driving circuit for an electromagnetic operating mechanism that performs switching operations of a power device. Background technique [0002] Conventionally, in a driving circuit of an electromagnetic operating mechanism for switching a vacuum valve of a power device such as a vacuum circuit breaker, when one movable iron core has two driving coils for closing and opening, the When current is passed to one drive coil, a voltage is generated across the other drive coil where no current flows due to induced electromotive force. Since the generated voltage is proportional to the turns ratio of the two drive coils, for example, if the number of turns of the open pole drive coil is 100 turns and the number of turns of the close pole drive coil is 500 turns, the When a voltage of 100V is applied to the open pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/38
CPCH01H33/38H01H33/6662H01H47/226
Inventor 释氏裕人
Owner MITSUBISHI ELECTRIC CORP