FULLY-CONTROLLED BRIDGE RECTIFYING DEVICE WITH SURGE SUPPRESSION FUNCTION

摘要

The present invention is suitable for a power supply control field, and provides a fully-controlled bridge rectifying device with surge suppression function. In the embodiment of the present invention, the electric equipment uses a fully-controlled bridge rectifying device with surge suppression function comprising a driving module, a first controllable half-bridge module, an isolation driving module, a second controllable half-bridge module, a half-bridge module and a current limiting resistor. At the starting moment of the electric equipment, the first controllable half-bridge module cooperates the half-bridge module to carry out the bridge rectifier for the alternative current to charge the filter capacitor quickly, and the surge is suppressed by the current limiting resistor, when the electrical equipment work from starting state transits to a stable work state, the first controllable half-bridge module cooperates the second controllable half-bridge module to carry out the fully-controlled bridge rectification for the alternative current to provide direct current to the electric device, the whole fully-controlled bridge rectifying device has the advantages of simple structure, low cost and small volume, and also effectively reduces the power consumption of the equipment.

主权项

1. A fully-controlled bridge rectifying device with surge suppression function, disposed in a electric equipment, and connected with a EMI filter network, a anti-surge control signal generator configured to output a corresponding anti-surge control signal according to the work state of the electric equipment, and a filter capacitor in the electric equipment, the fully-controlled bridge rectifying device with surge suppression function comprising:
a driving module, a first controllable half-bridge module, an isolation driving module, a second controllable half-bridge module, a half-bridge module and a current limiting resistor; wherein an input terminal of the driving module is connected to a DC power supply, a first control terminal and a fourth control terminal of the driving module, and a second control terminal and a third control terminal of the driving module, are respectively connected to a positive output terminal and a negative output terminal of the EMI filter network, a first control terminal and a second control terminal of the first controllable half-bridge module are respectively connected to a first output terminal and a second output terminal of the driving module, an output terminal of the first controllable half-bridge module and a ground terminal of the driving module are connected to a negative terminal of the filter capacitor, a first input terminal of the first controllable half-bridge module, a first input terminal of the second controllable half-bridge module and a first terminal of the half-bridge module are connected to the positive terminal of the EMI filter network, a second input terminal of the first controllable half-bridge module, a second input terminal of the second controllable half-bridge module and a second terminal of the half-bridge module are connected to the negative terminal of the EMI filter network, an output terminal of the second controllable half-bridge module is connected to the positive terminal of the filter capacitor, a control terminal, a first input terminal and a second input terminal of the isolation driving module are respectively connected to the anti-surge control signal generator, the positive output terminal and the negative output terminal of the EMI filter network, an output terminal of the isolation driving module is connected to a control terminal of the second controllable half-bridge module, the current limiting resistor is connected between an output terminal of the half-bridge module and the output terminal of the second controllable half-bridge module; and at the starting moment of the electric equipment, under the control of the driving module, the first controllable half-bridge module cooperates the half-bridge module to rectify the alternative current output from the EMI filter network and then charge the filter capacitor quickly, meanwhile the current limiting resistor suppresses the surge in the alternative current, and the anti-surge control signal make the isolation driving module control the second controllable half-bridge module to shut down; when the electrical equipment work from starting state transits to a stable work state, a work state of the first controllable half-bridge module remains the same, the isolation driving module drive the second controllable half-bridge module to be on under the control of the anti-surge control signal, the second controllable half-bridge module cooperates the first controllable half-bridge module to rectify the alternative current output from the EMI filter network and then provide direct current to the electric equipment, because the second controllable half-bridge module is on, the half-bridge module and the current limiting resistor stop working.