Braking unit

Abstract

The invention discloses a braking unit which comprises a braking resistor, an IGBT switching circuit used for controlling operations of the braking resistor and a power supply unit. The braking unit further comprises a control unit used for controlling operations of the IGBT switching circuit, and is characterized in that a signal output port of the control unit is electrically connected with the IGBT switching circuit through an IGBT driving unit, the IGBT switching circuit is provided with a temperature detection unit, the temperature detection unit is electrically connected with a signal input port of the control unit, the temperature detection unit comprises a temperature sensor and a pulse transformer TRANS1, the temperature sensor is connected with a secondary coil of the pulse transformer TRANS1, and a primary coil of the pulse transformer TRANS1 is electrically connected with a signal input terminal of a singlechip microcomputer. The braking unit realizes real-time monitoring for voltage, current, temperature and the like, and enables a user to know use conditions on site more quickly, thereby better solving problems.

Description

technical field [0001] The invention relates to the technical field of electronic equipment, in particular to a brake unit. Background technique [0002] Braking unit, the full name is "converter-specific energy consumption braking unit", or "converter-specific energy feedback unit", which is mainly used to control the occasions where the mechanical load is relatively heavy and the braking speed is required to be very fast. The braking resistor consumes the regenerative electric energy generated by the motor through the braking resistor, or feeds the regenerative current back to the current. At present, the traditional braking unit uses a voltage comparator to compare the collected DC bus signal with a fixed voltage Value, output a signal to control the IGBT on and off. Through long-term practice, it is found that the braking voltage cannot be adjusted because this traditional method relies solely on hardware for control. At the same time, the overcurrent protection in the...

AI Technical Summary

Problems solved by technology

Through long-term practice, it is found that because this traditional method relies solely on hardware for control, the braking voltage cannot be adjusted.

At the same time, the overcurrent protection in the circuit depends on the fuse. Once the overcurrent occurs, the fuse will burn out.

The braking unit is not recoverable, only components can be replaced

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