On-line Monitoring Method of Turn Insulation State of Inverter Driven Motor
A technology for driving motors and turn insulation, which is applied in the field of safety monitoring, can solve the problems of reducing the sensitivity and effectiveness of the method, and the weak diagnostic ability of the slight state change of the motor insulation, etc., and achieves the effect of strong anti-interference ability, high sensitivity and simple operation
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[0030] An on-line monitoring method for the turn insulation state of an inverter-driven motor. The inverter power device switching output transient terminal voltage is used as a high-frequency excitation, and the motor oscillating current during the switching transient is a transient response. Transient frequency response curve, and use the high-frequency sensitive characteristic component to realize on-line monitoring of turn insulation state.
[0031] An on-line monitoring method for turn insulation state of an inverter-driven motor, comprising the following steps, such as: figure 1 shown:
[0032] 1) First, use the high-frequency voltage sensor and the high-frequency current sensor to collect the inverter output voltage V ce and motor current I G .
[0033] 2) Then, the opposite terminal voltage V ce Edge detection is performed to determine whether it is the switching state of the power device.
[0034] 3) If the detection is not a switching transient process, go back ...
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