Thermal fault detection device for motor driver
A motor driver and detection device technology, applied in the direction of circuit devices, emergency protection circuit devices, emergency protection devices for automatic disconnection, etc., can solve problems such as overheating of the drive system, temperature rise, and failure of the drive system due to heat, and reduce Probability of overheating failure and the effect of extending the service life
Inactive Publication Date: 2020-03-31
GUIYANG AVIATION MOTOR
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[0004] The purpose of the present invention is to provide a motor driver thermal fault detection device to solve the problem that excessive current accumulation in the above background technology will cause the drive system to overheat, and the temperature will rise rapidly, causing the drive system to fail due to heat
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[0016] 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.
[0017] see Figure 1-3 , the present invention provides a technical solution: a thermal fault detection device for a motor driver, comprising a phase current feedback conditioning circuit 1; the output end of the phase current feedback conditioning circuit 1 is connected to an absolute value circuit 2; the output end of the absolute value circuit 2 is connected to There is a level pull-down circuit 3, the output end of the level pull-down circuit 3 is connecte...
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The invention discloses a thermal fault detection device for a motor driver. The thermal fault detection device comprises a phase current feedback conditioning circuit, the output end of the phase current feedback conditioning circuit is connected with an absolute value circuit; the output end of the absolute value circuit is connected with a level pull-down circuit, and the output end of the level pull-down circuit is connected with an overcurrent time integrator; and the output end of the overcurrent time integrator is connected with a fault judgment circuit. The over-current heat accumulation fault detection circuit has an over-current heat accumulation fault detection function on the motor driving system, can judge high and low levels output by the driving system and is used for over-heat shutdown protection of the driving system, the over-heat fault probability of the motor driving system is reduced, and the service life of the motor driving system is prolonged.
Description
technical field [0001] The invention relates to the field of motor fault detection equipment, in particular to the technical field of a motor phase current conditioning circuit, a heat accumulation circuit and a fault judgment circuit, in particular to a thermal fault detection device for a motor driver. Background technique [0002] Aviation high-power motors have the characteristics of long-term continuous operation, which not only requires good control ability, but also because of their different working environments, so the motor must have protection measures such as underload, overload, single-phase and short circuit. When the high-power motor is used, it needs to cooperate with the motor driver to form an aviation high-power motor drive system. [0003] However, when the motor phase current passes through the drive system, the current continues to pass through the drive system. Excessive current accumulation will cause the drive system to overheat, and the temperature ...
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IPC IPC(8): H02H7/085H02H5/04
CPCH02H5/041H02H7/085
Inventor 李建华
Owner GUIYANG AVIATION MOTOR