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A method for current switching control of acp100 driving mechanism

A driving mechanism and current switching technology, which is applied in the field of control, can solve the problems of fixed current ratio of two gears and complicated switching circuit, and achieve the effects of simple configuration, cost reduction, and simplified system design and maintenance

Active Publication Date: 2018-07-06
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional control method adopts the full-wave rectification and half-wave rectification two-level voltage power supply to realize the two-level switching of the driving current. The switching circuit is relatively complicated and the current ratio of the two levels is fixed.

Method used

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Embodiment Construction

[0011] A method for current switching control of an ACP100 drive mechanism, comprising the following steps

[0012] Step 1: When the driving mechanism is in the lifting state, the three-phase six-bridge control circuit uses a square wave with a phase difference of 120° between the three phases and a phase difference of 180° between the upper and lower half bridges for control in each cycle.

[0013] Step 2: When the driving mechanism changes from the lifting state to the holding state, the upper bridge maintains the on-off state before the conversion; the lower bridge circuit that was in the on state before the conversion is converted to a PWM control state, and the lower bridge that was in the off state before the conversion The circuit remains open. The ratio between the required current value during hold and the current value without PWM control is consistent with the duty cycle of the PWM control signal.

[0014] Step 3: When the driving mechanism changes from the holding...

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Abstract

Provided is a method for current switching control of an ACP 100 driving mechanism. The method comprises the following steps: step 1, when the driving mechanism is in the ascending-descending state, a three-phase six-bridge control circuit utilizes square waves with the three-phase difference of 120 degrees and the upper-lower half-bridge phase difference of 180 degrees in each period to control; step 2, when the driving mechanism is switched from the ascending-descending state to the maintaining state, an upper bridge keeps the on-off state before switchover; a lower bridge circuit in the conductive state before switchover is switched to be in a PWM control state, a lower-bridge circuit in the off state before switchover is kept in the off-state; during maintenance, it is required that the ratio of voltage value when PWM control is not carried out is the same as the duty cycle of a PWM control signal; step 3, when the driving mechanism is switched from the maintenance state to the ascending-descending state, the lower-bridge circuit in the PWM control state is switched in a conductive state with the rest of circuits unchanged and operation is continuously performed by following the step 1.

Description

technical field [0001] The invention belongs to the field of control methods, and in particular relates to a method for current switching control of an ACP100 driving mechanism. Background technique [0002] The characteristics of the ACP100 drive mechanism require that the current of the control power supply during maintenance is smaller than that during lifting operation. The traditional control method adopts the full-wave rectification and half-wave rectification two-level voltage power supply to realize the two-level switching of the driving current. The switching circuit is relatively complicated and the current ratio of the two levels is fixed. The invention proposes a control method based on pulse width modulation, which can solve the problems existing in the original method. Contents of the invention [0003] The purpose of the present invention is to propose a method for current switching control of the ACP100 drive mechanism, which meets the control requirements...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 余海涛蔡晨梁云川吕新知马权
Owner NUCLEAR POWER INSTITUTE OF CHINA