CN205986691U - Start difunctional circuit of drive / rectification that power generating equipment used - Google Patents

Abstract

The utility model provides a start difunctional circuit of drive / rectification that power generating equipment used, include the contravariant bridge drive circuit parallelly connected with the battery, contravariant bridge drive circuit is connected to form by six field effect transistor, a field effect transistor is connected synchronous generator winding A interface with the bridge arm output that fourth field effect transistor forms, the 2nd field effect transistor is connected synchronous generator winding B interface with the bridge arm output that the 5th field effect transistor forms, the 3rd field effect transistor is connected synchronous generator winding C interface with the bridge arm output that the 6th field effect transistor forms, freewheeling circuit includes six freewheeling diode, and each freewheeling diode and a field effect transistor are parallelly connected, battery and steady voltage capacitance parallel connection, the utility model discloses combine motor -drive circuit and rectifier circuit together, both saved the equipment of extra commutation equipment and check point pyrogene merit, saved the switching process of drive circuit with rectifier circuit again, consequently greatly alleviateed weight of equipment, operating is simplified process.

Description

A driving/rectifying dual-function circuit for starting/generating equipment

technical field

The utility model relates to a drive/rectification dual-function circuit, in particular to a drive/rectification dual-function circuit for starting/generating equipment.

Background technique

In various fields, engine equipment and power generation equipment coaxial with the engine are involved. In traditional equipment, the engine has additional starting devices, which are heavy and complicated to operate. Therefore, the synchronous generator used for the coaxial engine has emerged as the starting/generating equipment for the electric motor to ignite the engine, and has been more and more widely used. However, in the starting/generating equipment, a direct current is required to drive the synchronous generator's inverter bridge circuit to connect the synchronous generator to drive the synchronous generator to ignite the engine. After the ignition is successful, it is also necessary to switch the drive circuit connected to the synchronous generator to the rectifier circuit, so that the three-phase alternating current generated by the synchronous generator is rectified and stabilized to form direct current to supply power to various electrical equipment. It can be seen from this that the starting/generating equipment used at this stage needs two kinds of circuits and needs to switch between the circuits after detecting the successful ignition of the engine. At the same time, it needs to add extra measuring equipment to detect whether the motor is successfully ignited, which cannot meet the needs of small weight, Simple operation and high reliability requirements.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a driving/rectifying dual-function circuit for starting/generating equipment, which has the advantages of small weight, simple operation and high reliability.

In order to achieve the above object, the technical solution adopted by the utility model is:

A drive/rectification dual-function circuit for starting/generating equipment, including an inverter bridge drive circuit connected in parallel with a battery B, the inverter bridge drive circuit consists of a first field effect transistor Q1, a second field effect transistor Q2, a third field effect transistor The effect tube Q3, the fourth FET Q4, the fifth FET Q5, and the sixth FET Q6 are connected, and the output end of the bridge arm composed of the first FET Q1 and the fourth FET Q4 is connected to the synchronous generator M winding A interface, the output end of the bridge arm composed of the second FET Q2 and the fifth FET Q5 is connected to the synchronous generator M winding B interface, the bridge arm composed of the third FET Q3 and the sixth FET Q6 The output end is connected to the C interface of the M winding of the synchronous generator;

The freewheeling circuit includes a first freewheeling diode D1, a second freewheeling diode D2, a third freewheeling diode D3, a fourth freewheeling diode D4, a fifth freewheeling diode D5, a sixth freewheeling diode D6, and the first freewheeling diode D6. The diode D1 is connected in parallel with the first field effect transistor Q1, the second freewheeling diode D2 is connected in parallel with the second field effect transistor Q2, the third freewheeling diode D3 is connected in parallel with the third effect transistor Q3, and the fourth freewheeling diode D4 is connected in parallel with the fourth field effect transistor The effect transistor Q4 is connected in parallel, the fifth freewheeling diode D5 is connected in parallel with the fifth field effect transistor Q5, the sixth freewheeling diode D6 is connected in parallel with the sixth field effect transistor Q6; the storage battery B is connected in parallel with the stabilizing capacitor C1.

The storage battery B is a lead-acid storage battery.

The voltage stabilizing capacitor C1 is an electrolytic capacitor.

The freewheeling diode is a high-power diode.

A rotor position sensor is embedded in the synchronous generator M.

The beneficial effects of the utility model are:

Compared with the traditional technology, the utility model integrates the motor driving circuit and the rectifying circuit, which not only saves additional rectifying equipment and equipment for detecting successful ignition, but also saves the switching process between the driving circuit and the rectifying circuit, so it is extremely Greatly reduces the weight of the equipment and simplifies the operation process.

Description of drawings

Fig. 1 is the circuit diagram of the utility model.

detailed description

The utility model will be clearly and completely described below in conjunction with the accompanying drawings.

Referring to Fig. 1, a driving/rectifying dual-function circuit for starting/generating equipment includes an inverter bridge drive circuit connected in parallel with a battery B, and the inverter bridge drive circuit consists of a first field effect transistor Q1 and a second field effect transistor Q2 , the third field effect transistor Q3, the fourth field effect transistor Q4, the fifth field effect transistor Q5, and the sixth field effect transistor Q6 are connected, and the bridge arm output terminal composed of the first field effect transistor Q1 and the fourth field effect transistor Q4 Connect the A interface of the M winding of the synchronous generator, the output end of the bridge arm composed of the second FET Q2 and the fifth FET Q5 is connected to the B interface of the M winding of the synchronous generator, the third FET Q3 and the sixth FET Q6 The output end of the composed bridge arm is connected to the C interface of the M winding of the synchronous generator;

The freewheeling circuit includes a first freewheeling diode D1, a second freewheeling diode D2, a third freewheeling diode D3, a fourth freewheeling diode D4, a fifth freewheeling diode D5, a sixth freewheeling diode D6, and the first freewheeling diode D6. The diode D1 is connected in parallel with the first field effect transistor Q1, the second freewheeling diode D2 is connected in parallel with the second field effect transistor Q2, the third freewheeling diode D3 is connected in parallel with the third effect transistor Q3, and the fourth freewheeling diode D4 is connected in parallel with the fourth field effect transistor The effect transistor Q4 is connected in parallel, the fifth freewheeling diode D5 is connected in parallel with the fifth field effect transistor Q5, the sixth freewheeling diode D6 is connected in parallel with the sixth field effect transistor Q6; the storage battery B is connected in parallel with the stabilizing capacitor C1.

The storage battery B is a lead-acid storage battery.

The voltage stabilizing capacitor C1 is an electrolytic capacitor.

The freewheeling diode is a high-power diode.

A rotor position sensor is embedded in the synchronous generator M.

The working principle of the utility model is: the freewheeling circuit in the drive circuit of the inverter bridge is used as a rectifying circuit to realize the dual functions of driving and rectifying the circuit.

In the start-up phase of the synchronous generator M, the field effect transistors in the inverter bridge circuit are turned on alternately to realize the drive of the synchronous generator M with direct current. During the driving process, the M winding of the synchronous generator conducts alternately in both directions, and since the reactive power will be stored in the motor winding after conduction, which hinders the reverse conduction of the winding in the next state, therefore, due to the parallel connection of FETs Freewheeling diodes to discharge the reactive power stored in the motor windings. When the engine is successfully ignited, the speed will increase rapidly, and the speed of the synchronous generator M will also increase rapidly. When its reverse electromotive force is greater than the voltage across the battery B, the field effect tubes are all cut off due to the reverse voltage, and the synchronous generator M enters the power generation state. At this time, the freewheeling circuit becomes a rectification circuit, which rectifies the three-phase alternating current generated by the synchronous generator M into direct current, and then charges the battery B after being stabilized by the voltage stabilizing capacitor C1 for use by electrical equipment.

Claims (5)

1. A drive/rectification dual-function circuit for starting/generating equipment, characterized in that: comprise an inverter bridge drive circuit connected in parallel with storage battery (B), the inverter bridge drive circuit consists of the first field effect transistor (Q1), The second FET (Q2), the third FET (Q3), the fourth FET (Q4), the fifth FET (Q5), and the sixth FET (Q6) are connected, and the first field The output end of the bridge arm composed of the effect tube (Q1) and the fourth FET (Q4) is connected to the winding A interface of the synchronous generator (M), and the second FET (Q2) and the fifth FET (Q5) are composed of The output end of the bridge arm is connected to the B interface of the synchronous generator (M) winding, and the output end of the bridge arm composed of the third FET (Q3) and the sixth FET (Q6) is connected to the C interface of the synchronous generator (M) winding; The freewheeling circuit includes a first freewheeling diode (D1), a second freewheeling diode (D2), a third freewheeling diode (D3), a fourth freewheeling diode (D4), a fifth freewheeling diode (D5), a Six freewheeling diodes (D6), the first freewheeling diode (D1) is connected in parallel with the first field effect transistor (Q1), the second freewheeling diode (D2) is connected in parallel with the second field effect transistor (Q2), and the third freewheeling diode (D1) is connected in parallel with the second field effect transistor (Q2). The diode (D3) is connected in parallel with the third effect transistor (Q3), the fourth freewheeling diode (D4) is connected in parallel with the fourth field effect transistor (Q4), the fifth freewheeling diode (D5) is connected in parallel with the fifth field effect transistor (Q5) In parallel, the sixth freewheeling diode (D6) is connected in parallel with the sixth field effect transistor (Q6); the storage battery (B) is connected in parallel with the voltage stabilizing capacitor (C1). 2. A driving/rectifying dual-function circuit for starting/generating equipment according to claim 1, characterized in that: said battery (B) is a lead-acid battery. 3. A driving/rectifying dual-function circuit for starting/generating equipment according to claim 1, characterized in that: the voltage stabilizing capacitor (C1) is an electrolytic capacitor. 4. A driving/rectifying dual-function circuit for starting/generating equipment according to claim 1, characterized in that: said freewheeling diode is a high-power diode. 5. A driving/rectifying dual-function circuit for starting/generating equipment according to claim 1, characterized in that: said synchronous generator (M) is embedded with a rotor position sensor.