CN203057043U - Electric braking device for three-phase asynchronous motor in electric actuating mechanism - Google Patents
Electric braking device for three-phase asynchronous motor in electric actuating mechanism Download PDFInfo
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- CN203057043U CN203057043U CN 201220672655 CN201220672655U CN203057043U CN 203057043 U CN203057043 U CN 203057043U CN 201220672655 CN201220672655 CN 201220672655 CN 201220672655 U CN201220672655 U CN 201220672655U CN 203057043 U CN203057043 U CN 203057043U
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- braking device
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Abstract
The utility model discloses an electric braking device for a three-phase asynchronous motor in an electric actuating mechanism. The electric braking device comprises an energy storage circuit, an automatic switch-in circuit and a motor braking circuit which are in mutual electric connection. The beneficial effects of the electric braking device are that, improved energy consumption braking principles are used, such that higher braking ability than energy consumption braking, and better reliability and a more stable braking effect than reverse connection braking are obtained; and the effective braking of the motor is achieved, and the device has high adaptive capability and is capable of automatically adjusting the braking force according to different motors so as to reduce the coasting of the motor after the operation is stopped and removing the oscillation, thereby ensuring the control precision of an actuator.
Description
Technical field
The utility model relates to a kind of electric braking structure of threephase asynchronous; The electric braking device that particularly relates to threephase asynchronous in a kind of electric operator.
Background technology
The threephase asynchronous that existing electric operator uses, usually use running and the shutoff of contactor control motor, weak point is, when behind motor operation, stopping, the mechanical inertia of motor is big, causes the actuator coasting operation in the electric operator big, because the coasting operation of motor, the problem that also causes the machine vibration easily occurs, and the control precision of electric operator is reduced.
Summary of the invention
Technical problem to be solved in the utility model is, overcomes defective of the prior art, provide a kind of when reducing motor and shutting down coasting operation, eliminate the electric braking device of the adaptive electric motor of machine vibration.
The technical scheme that the utility model adopts is, the electric braking device of threephase asynchronous machine in a kind of electric operator, comprise, accumulator, automatic place in circuit and motor brake circuit, described accumulator, automatic place in circuit and motor brake circuit are electrically connected mutually.
Described accumulator comprises rectifier diode D1 and storage capacitor C3, and the positive pole of described rectifier diode D1 is connected with the centre cap of motor, and the negative pole of rectifier diode D1 is by wherein one being connected in the three-phase electricity of storage capacitor C3 and motor; The two ends of described automatic place in circuit (JP2-1, JP2-2) are connected with one group of normally closed auxiliary contact of control motor contactor; Described motor brake circuit comprises the circuits for triggering of controllable silicon Q1 and described controllable silicon Q1, and the output of described motor brake circuit is connected with the centre cap of motor.
The model that described rectifier diode D1 adopts is 10A10, and the model that described controllable silicon Q1 adopts is CS19-12.
The beneficial effects of the utility model are that owing to adopt improved dynamic braking principle, the specific energy consumption braking has stronger stopping power, than plug braking better reliability and more stable braking effect is arranged; Can realize effectively braking to motor, adaptive ability is strong, regulates braking force automatically according to different motors, thereby reduces coasting operation after motor shuts down and the purpose of oscillation-damped, guarantees the control precision of actuator.
Description of drawings
Fig. 1 is the electrical schematic diagram of the electric braking device of the utility model threephase asynchronous machine;
Fig. 2 is the time dependent state diagram of the voltage of the utility model braking procedure.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Design principle of the present utility model is, is motor when utilizing the threephase asynchronous machine energising, and the process that outage back coasting operation is slided is the characteristics of generator, hinders the coasting operation campaign of motor with the electric power that sends, and reaches the purpose of braking motor.The utility model is when motor rotates after contactor is connected power supply, the brake circuit automatic disconnection; After contactor resetted, the motor outage inserted brake circuit automatically.Therefore, this device can adapt to state of motor automatically.
After brake circuit inserted, motor was carrying out coasting operation and is rotating, at this moment, owing to the electromagnetic induction of motor generates electricity, carry out halfwave rectifier by this alternating current of diode pair, when the voltage that produces when motor is higher than the voltage of energy storage electrochemical capacitor, diode current flow is given the charging of energy storage electrochemical capacitor.When the energy storage electrochemical capacitor was full of electricity, diode turn-offed, and motor stops to charge to electric capacity, and the electric energy that energy storage capacitor stores discharged to motor, at this moment, motor is subjected to a galvanic influence, produce the stationary magnetic field, thereby the coasting operation that realizes motor is braked again.After energy storage capacitor discharge is finished, repeat a process again, up to motor stop fully not can the regeneration induced voltage till.
Fig. 1 is the electrical schematic diagram of the electric braking device of the utility model threephase asynchronous machine.As shown in Figure 1, the electric braking device of threephase asynchronous comprises in the utility model electric operator, accumulator, automatic place in circuit and motor brake circuit, and described accumulator, automatic place in circuit and motor brake circuit are electrically connected mutually.
Described accumulator, comprise rectifier diode D1 and storage capacitor C3, the positive pole of described rectifier diode D1 is connected with the centre cap of motor, namely, be connected with the centre cap binding post DJ-M of motor, the negative pole of rectifier diode D1 is by wherein one being connected in the three-phase electricity of storage capacitor C3 and motor, namely, (C) be connected with the binding post DJ-A (B) of motor, wherein A (B) is the binding post connection of any phase in the three-phase alternating current (C); The two ends of described automatic place in circuit (JP2-1, JP2-2) are connected with one group of normally closed auxiliary contact of control motor contactor; Described motor brake circuit comprises the circuits for triggering of controllable silicon Q1 and described controllable silicon Q1, and the output of described motor brake circuit is connected with the centre cap of motor.The model that described rectifier diode D1 adopts is 10A10, and the model that described controllable silicon Q1 adopts is CS19-12.
The utility model electric braking device braking procedure is as follows:
When motor is worked, contactor adhesive motor connecting power, the normally closed auxiliary contact of contactor disconnects, and the control loop of controllable silicon Q1 disconnects, and electric current enters from terminal JP1-1, and D1 does halfwave rectifier by diode, gives energy storage electrochemical capacitor C3 charging then.Because the unilateal conduction characteristic that diode D1 has, energy storage electrochemical capacitor C3 is can be by D1 to the motor discharge, so in the course of work of motor, energy storage electrochemical capacitor C3 only is operated in charging energy storage state.
When contactor resets, the motor dead electricity, the normally closed auxiliary contact of contactor resets, the SCR control loop is inserted automatically, when the control end dividing potential drop of controllable silicon Q1 surpasses the trigger voltage of controllable silicon Q1, controllable silicon Q1 conducting, energy storage electrochemical capacitor C3 is by controllable silicon Q1, inductance coil L, and terminal JP1-1 feeds motor with direct current.After energy storage electrochemical capacitor C3 discharge, when the control grid dividing potential drop of controllable silicon Q1 can't reach the triggering and conducting voltage of controllable silicon Q1, controllable silicon Q1 turn-offed, and finishes braking procedure one time.
Resistance R 1 and R2 in the circuit play the dividing potential drop effect, and purpose is to control the angle of flow of controllable silicon Q1, and capacitor C2 is the high pressure ceramic disc capacitor that shields.Resistance R 3, capacitor C1 are resistance capaciting absorpting circuits, for the protection of controllable silicon Q1.
Then, motor is subjected to the influence of braking force, during if do not stop yet, then will inevitably continue to produce induced electromotive force, and partly continue charging for the accumulator of motor brake circuit by terminal JP1-1, JP1-2, when the voltage that charges into satisfies the triggering and conducting condition of controllable silicon Q1, carry out the braking procedure of next round automatically.
Fig. 2 is the time dependent state diagram of the voltage of motor braking process of the present utility model.As shown in Figure 2, through the braking procedure again of the motor in several cycles, but the motor fast braking and enters stable state, thereby, guarantee the control precision of actuator.
The utility model adopts improved dynamic braking principle, and the specific energy consumption braking has stronger stopping power, than plug braking better reliability and more stable braking effect is arranged; Can realize effectively braking to motor, adaptive ability is strong, regulates braking force automatically according to different motors, thereby reduces coasting operation after motor shuts down and the purpose of oscillation-damped, guarantees the control precision of actuator.
Claims (1)
1. the electric braking device of threephase asynchronous machine in the electric operator is characterized in that, comprises accumulator, place in circuit and motor brake circuit automatically; Described accumulator comprises rectifier diode D1 and storage capacitor C3, and the positive pole of described rectifier diode D1 is connected with the centre cap of motor, and the negative pole of rectifier diode D1 is by wherein one being connected in the three-phase electricity of storage capacitor C3 and motor; The two ends of described automatic place in circuit (JP2-1, JP2-2) are connected with one group of normally closed auxiliary contact of control motor contactor; Described motor brake circuit comprises the circuits for triggering of controllable silicon Q1 and described controllable silicon Q1, and the output of described motor brake circuit is connected with the centre cap of motor.
2. the electric braking device of threephase asynchronous machine in a kind of electric operator according to claim 1 is characterized in that, the model that described rectifier diode D1 adopts is 10A10, and the model that described controllable silicon Q1 adopts is CS19-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220672655 CN203057043U (en) | 2012-12-06 | 2012-12-06 | Electric braking device for three-phase asynchronous motor in electric actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220672655 CN203057043U (en) | 2012-12-06 | 2012-12-06 | Electric braking device for three-phase asynchronous motor in electric actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203057043U true CN203057043U (en) | 2013-07-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220672655 Expired - Fee Related CN203057043U (en) | 2012-12-06 | 2012-12-06 | Electric braking device for three-phase asynchronous motor in electric actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203057043U (en) |
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2012
- 2012-12-06 CN CN 201220672655 patent/CN203057043U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN JINBO INSTRUMENT TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: TIANJIN BOSIKE METER TECHNOLOGY CO., LTD. Effective date: 20130719 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130719 Address after: 300384 Tianjin City Huayuan Industrial Zone (outer ring) Haitai Road No. 18 Patentee after: Tianjin Jinbo Instrument Technique Co., Ltd. Address before: 300384 Tianjin city Nankai District Huayuan Industrial Zone (outer ring) Haitai development two Road No. 1 Patentee before: Tianjin Bosike Instrument Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20151206 |
|
| EXPY | Termination of patent right or utility model |