Circuit for monitoring normal/abnormal work of trigger electromagnet of elevator brake

Abstract

The invention relates to a circuit for monitoring normal / abnormal work of the trigger electromagnet of an elevator brake, which comprises resistors R1, R2 and R3 and an audion Q3; the first access end of the trigger electromagnet is connected to a driving circuit; the second access end of the trigger electromagnet is connected with the resistors R1 and R2 in series; the other end of the resistor R2 is earthed; the resistors R1 and R2 are accessed into the base electrode of the audion Q3; two ends of the resistor R3 are respectively connected with a power supply VCC (virtual channel connection) and the collector of the audion Q3; the resistor R3 provides working voltage to the Q3; the emitting electrode of the audion Q3 is earthed; the collector of the Q3 is connected with an IN lead; the lead IN is accessed to the analog quantity input port of the control circuit; the input voltage signal of the circuit is accessed in from one end of the resistor R1; and an output voltage signal is output from the IN lead. Because the circuit for monitoring the working state of the trigger electromagnet of an elevator brake is provided with the electromagnet driving circuit with real-time monitoring functions of monitoring the open circuit, the short circuit and the like of the electromagnet circuit on line, the elevator brake fault can be detected in time, and the reliability of the safe operation of the elevator is improved.

Description

technical field [0001] The invention belongs to the technical field of elevator safety control, and in particular relates to a circuit for triggering an electromagnet of an elevator wire rope brake with circuit break and short circuit monitoring functions. Background technique [0002] The elevator wire rope brake is a safety component of the elevator. When the elevator overspeeds upward or accidentally slides, the wire rope brake acts to clamp the elevator's traction wire rope to stop the elevator and protect the safety of people and goods in the car. [0003] There are two trigger methods for the action of the elevator wire rope brake: one is mechanical trigger, and the other is electronic trigger. At present, purely mechanical triggers are rarely used, and most of them use electronic triggers, which use traction electromagnets. When the elevator wire rope brake product uses electromagnet as the action trigger mechanism, because it is a mechatronic product, there is a sit...

AI Technical Summary

Problems solved by technology

When the elevator wire rope brake product uses electromagnet as the action trigger mechanism, because it is a mechatronics product, there is a situation that the line or electromagnet fails and cannot be found in time, but when the brake action is required, it cannot be effectively triggering the brakes, thereby endangering the safe operation of the elevator

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