| 摘要 |
A method and circuit for the detection of breaks in the high-power circuit of a voltage inverter, whereas the method consists in the comparing of the rectified minimum peak current against the reference value and in the indication of failure states, characterized in that while transmitting the current to a known current regulator in the frequency inverter (with current inverter) control and regulation circuit, a minimum peak actual current of the frequency converter current (Ism) vs. time signal is formed based on the actual current of the frequency converter, whereas the actual current of the frequency converter is metered in its intermediate circuit or based on the sum of rectified currents in wires.2. A circuit for the detection of breaks in the high-power circuit of a frequency inverter (with current inverter), connected via a rectifier or directly with a metering circuit connected to the input or output of the inverter respectively or in its intermediate circuit, and including a transistor, capacitor and Zener diode, characterized in that the transistor (T1) emitter is connected via the resistor (R2) with the transistor (T2) base, whereas the transistor (T2) base is connected via the resistor (R3) with the input (WeIz) of the current set-value, whereas the input is connected with the input of a known current regulator in the control and regulation unit of the frequency inverter (with current inverter).<IMAGE>
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