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Motor control device

A control device and motor technology, applied in the direction of the reduction device of the AC motor, the electric motor/converter plug, etc., can solve the problems of excessive temperature rise of the dynamic braking resistor, fire, damage to surrounding parts, etc.

Active Publication Date: 2013-06-12
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, if the temperature of the dynamic braking resistor rises excessively, it may cause damage to the surrounding components, or eventually cause the dynamic braking resistor to be disconnected, etc., resulting in unsafe actions such as fire and smoke.

Method used

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Embodiment approach

[0016] figure 1 It is a block diagram of a motor control system including the motor control device 15 of the present invention. This motor control system is used in FA-related devices such as semiconductor manufacturing equipment, conveying equipment, and machine tools. This motor control system is composed of a motor control device 15 , a power supply 1 and a motor 5 . AC power is supplied from the power source 1 to the motor control device 15 , and the motor control device 15 controls the rotation operation and the motion operation of the motor 5 according to an external command value 31 to drive the motor 5 . In addition, in this embodiment, an example of three-phase driving of the motor 5 was given.

[0017] exist figure 1 Here, the power supply 1 is a single-phase or three-phase AC voltage, and as a voltage value, 100V, 200V, 400V, etc. are used.

[0018] Such as figure 1 As shown, the motor control device 15 has a configuration including a power supply circuit 23...

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PUM

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Abstract

This motor control device has a dynamic brake function of absorbing the energy of a motor to apply a brake to the motor. The motor control device comprises: a dynamic brake resistor; a thermal switch which is arranged adjacent to the dynamic brake resistor; a thermal fuse which is arranged adjacent to the dynamic brake resistor and is connected to the dynamic brake resistor in series; and a disconnection detection circuit which detects the state of disconnection in the thermal switch. In the motor control device, the working temperature of the thermal switch is set at a temperature lower than the working temperature of the thermal fuse.

Description

technical field [0001] The invention relates to a motor control device with dynamic braking function. Background technique [0002] Generally, servo motors are used to drive FA (Factory Automation: Factory Automation)-related devices such as semiconductor manufacturing equipment, conveying equipment, and machine tools. The motor control device is installed in the device in conjunction with the servo motor, and controls the action of the servo motor to perform the action desired by the user. In many cases, a motor control device incorporates a dynamic brake circuit for emergency stopping of the motor in the event of an abnormality. [0003] figure 2 It is an explanatory diagram of a motor control device 95 provided with a conventional dynamic braking function. The motor control device 95 includes: a PWM inverter circuit 4 that drives the motor 5; a control circuit 96 and a gate drive circuit 7 that drives the PWM inverter circuit 4 based on a command value 31 notified from...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P3/22
CPCH02P3/22
Inventor 土居觉
Owner PANASONIC CORP