Protection device of motor, motor and protection method of motor

Abstract

The invention discloses a protection device of a motor, the motor and a protection method of the motor. The protection device comprises a sampling module (102), a first comparison module (104), a switch module (106) and a first control module (108). The sampling module (102) is used for acquiring the current voltage of the motor; the first comparison module (104) is used for comparing the currentvoltage and a preset protection voltage. The switch module (106) is used for triggering a preset overcurrent protection signal when the current voltage is larger than or equal to the protection voltage and the degree that the current voltage is larger than the protection voltage is within a set range; and the first control module (108) is used for adjusting the output power of the motor accordingto the overcurrent protection signal to enable the current voltage to be decreased. According to the scheme, the problem of high cost due to the fact that an IPM module is provided with an overcurrentprotection module and a driving module composed of a discrete element and does not have an overcurrent protection function, and a peripheral protection circuit needs to be erected in the prior art issolved, and the effect of lowering the cost is achieved.

Description

technical field [0001] The invention belongs to the technical field of motor control, and specifically relates to a motor protection device, a motor and a protection method thereof, in particular to an overcurrent protection circuit, a motor with the overcurrent protection circuit, and an overcurrent protection method for the motor. Background technique [0002] Discrete MOSFET or IGBT controllable components, as a low-cost solution, can replace an integrated IPM module (Intelligent Power Module, Intelligent Power Module) to drive the motor. During the operation of the motor, affected by various factors such as its voltage and current, the discrete component MOSFET or IGBT controllable components have a certain range of voltage and current tolerance. Excessive voltage and current may cause module damage and burnout, resulting in Motor failure. [0003] There is an overcurrent protection module inside the integrated IPM module, but the hardware cost of this solution is high....

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Problems solved by technology

[0004] The object of the present invention is to provide a motor protection device, a motor and a protection method thereof to solve the problem of high cost of the IPM module in the prior art and achieve the effect of reducing the cost in view of the above defects

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