A servo drive brake control circuit
A technology of servo drive and brake control, which is applied in the field of servo drive, can solve the problems of slow response of brake circuit, short service life of brake circuit, and influence on brake effect, so as to improve the reaction speed and avoid the effect of brake effect
Active Publication Date: 2018-07-03
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0005] In view of this, the present invention provides a servo drive brake control circuit to solve the problems of slow response of the entire brake circuit, short service life of the brake circuit and poor contact of the relay contacts, etc.
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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0030] The embodiment of the invention discloses a brake control circuit for a servo drive to solve the problems of slow response of the entire brake circuit, short service life of the brake circuit, and poor contact of relay contacts, which affect the braking effect and the like.
[0031] see figure 1 , a circuit diagram of a brake control circuit of a servo driver provided by an embodiment of the present invention, the brake control circuit of a servo driver...
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The invention discloses a servo driver brake control circuit which comprises a switch tube, a surge absorption circuit and a CPU (central processing unit) positioned in a servo driver. The CPU outputs a driving signal representing a brake instruction, and the switch tube is on according to the driving signal so as to connect a brake coil power source with a passageway in front of a brake coil. It is observed that the switch tube is adopted as a switch element, and compared with delayed electrification of a relay coil in the process of turning on a relay, the switch tube can be immediately on after receiving the driving signal, so that response speed of a brake circuit can be increased greatly by replacing the relay with the switch tube. In addition, the problem of influence, on brake effect, of bad contact of a relay contact and the problem of short service life of the brake circuit of the servo driver due to frequent action of the relay contact are avoided effectively.
Description
technical field [0001] The present invention relates to the technical field of servo drives, and more specifically, relates to a brake control circuit of a servo drive. Background technique [0002] Servo drive, also known as "servo controller" and "servo amplifier", is a controller used to control servo motors. Its function is similar to that of frequency converters on ordinary AC motors. Precision positioning system. Generally, the servo motor is controlled by three methods of position, speed and torque to achieve high-precision positioning of the transmission system. [0003] At present, the working principle of the brake circuit of the servo driver is: the servo driver outputs a brake signal to drive the relay coil to be energized, the relay contacts are closed, and the path between the brake coil power supply and the brake coil is connected to realize brake lock. However, the use of relays as switching elements has the following problems: 1. The design of the isolatio...
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IPC IPC(8): H02P3/06
CPCH02P3/06
Inventor 李东洋晏晚君李建斌王鑫齐飞勇陶通涓杨裕才閤栓
Owner GREE ELECTRIC APPLIANCES INC