CN217935449U - Starting system of digital generator inverter switching power supply - Google Patents

Abstract

The utility model discloses a start-up system of digital generator dc-to-ac converter switching power supply, it includes rectification filtering voltage stabilizing module, switching power supply start unit, switching power supply module includes transformer and control circuit, switching power supply start unit stops the control circuit power supply to switching power supply module's control circuit power supply, when rectification filtering voltage stabilizing module output high voltage to switching power supply module when rectification filtering voltage stabilizing module output low voltage. The starting system of the digital generator inverter switching power supply can achieve the full-time power supply technical effect that the direct power supply is carried out by the three-phase rectified bus direct current of the permanent magnet motor main winding in the early stage and the direct current of the permanent magnet motor main winding in the later stage is processed and then is supplied through the bus low-voltage direct current power supply structure.

Description

Starting system of digital generator inverter switching power supply

Technical Field

The utility model relates to a digital variable frequency generator set technical field, concretely relates to starting system of digital generator dc-to-ac converter switching power supply.

Background

In the design of a conventional permanent magnet motor of a digital generator, a three-phase main winding part and an auxiliary power supply winding part are included, and specifically, a stator assembly of the permanent magnet motor is provided with a three-phase main winding coil, an inverter power supply winding coil, an igniter power supply winding coil, a direct current charging winding coil and the like. The circuit design can meet the power supply requirement of the corresponding module at any time when the generator normally operates, and further, the full-time power supply effect is formed. The power supply of the inverter module of the digital generator in the current market basically adopts the independent winding coil of the permanent magnet motor on the unit to provide energy, and the switch power supply module in the inverter provides power supply for other circuits in the inverter. In the prior art, in order to achieve higher power output and simplified process by reasonably utilizing the space of the digital generator permanent magnet motor, the digital generator permanent magnet motor abandons an inverter power supply winding coil, an igniter power supply winding coil, a direct current charging winding coil and the like, and the vacated space is used for optimizing a three-phase main winding part. After the windings of the permanent magnet motor of the digital generator are optimized, no independent winding provides power for the inverter, and the corresponding full-time power supply effect disappears.

The voltage for controlling the power supply which meets the conditions can only be obtained by processing after the normal operation of the generator. Because the unprocessed direct current voltage is high and cannot be directly used for supplying power to a circuit of an inverter system, a switching power supply module in the inverter is required to transform and filter the voltage and then output a low-voltage direct current power supply, and the low-voltage direct current power supply can be used for supplying power to other circuits in the inverter.

Disclosure of Invention

The to-be-solved technical problem of the utility model is how after having optimized digital generator permanent-magnet machine winding, do not have independent winding to provide under the power prerequisite for inverter system circuit, adopt the generating line direct current behind the permanent-magnet machine main winding three-phase rectification to design corresponding circuit and regard as switching power supply start-up system, through the control conversion, provide stable power for other circuits in the dc-to-ac converter.

Generally, the design idea of the technical scheme is that a switching power supply directly adopts the three-phase rectified bus direct current of the main winding of the permanent magnet motor, and the switching power supply starting unit in the technical scheme is used as a switching power supply starting system to provide a stable power supply for other circuits in an inverter.

In order to solve the technical problem, the utility model adopts the following technical scheme: the starting system of the digital generator inverter switching power supply comprises a rectification filtering voltage stabilizing module, a switching power supply module and a switching power supply starting unit, wherein the rectification filtering voltage stabilizing module rectifies and filters alternating-current voltage output by a generator into smooth direct-current voltage and performs voltage stabilization regulation to provide power, the switching power supply module supplies power to a load, the switching power supply module comprises a transformer and a control circuit, the switching power supply starting unit supplies power to the control circuit of the switching power supply module when the rectification filtering voltage stabilizing module outputs low voltage and stops supplying power to the control circuit of the switching power supply module when the rectification filtering voltage stabilizing module outputs high voltage, the input end of the transformer of the switching power supply module is connected with the rectification filtering voltage stabilizing module, the transformer is connected with the control circuit and supplies power to the control circuit by the transformer, the transformer is further provided with an output end for supplying power to the load, the switching power supply starting unit comprises a low-voltage conducting circuit and a high-voltage disconnecting circuit, the input end of the low-voltage conducting circuit is connected with the rectification filtering voltage stabilizing module, the output end of the low-voltage conducting circuit is connected with the control circuit, the low-voltage conducting circuit supplies power supply to the high-voltage filtering voltage power supply module when the rectification filtering voltage stabilizing module outputs low-voltage.

The switch power supply starting unit directly utilizes the bus direct current of the rectification filtering voltage stabilization module to supply power to the control circuit of the switch power supply module, because the working speed of the internal combustion engine of the generator is rapidly increased from low after being started, the voltage generated in the process can have a time period meeting the requirement of controlling the power supply voltage, therefore, when the internal combustion engine is in low speed and the rectification filtering voltage stabilization module is in low-voltage direct current output, the rectification filtering voltage stabilization module can be directly guided to supply power to the control circuit of the switch power supply module by low-voltage direct current, and the control circuit guides the transformer to supply power to each load after working, thereby establishing the whole-period power supply process. When an internal combustion engine part of the generator works at a normal high rotating speed, the bus voltage of the rectification, filtering and voltage stabilizing module is very high, the bus direct current of the rectification, filtering and voltage stabilizing module can be disconnected from a power supply path of a control circuit of the switching power supply module by judging the voltage, then a transformer of the switching power supply module processes the high-voltage direct current output by the rectification, filtering and voltage stabilizing module into low-voltage direct current to be supplied to the control circuit, and the control circuit guides the transformer to supply power to each load after working. Therefore, the control circuit of the switching power supply module can work in the whole time period in the power generation process.

The switch power supply starting unit guides the bus direct current of the rectification and filtering voltage stabilizing module to supply power to the control circuit when the rectification and filtering voltage stabilizing module outputs low voltage, guides the transformer to supply power to the control circuit when the rectification and filtering voltage stabilizing module outputs high voltage, and finally the switch power supply module supplies power to the load in the whole period. These loads include igniter power supply circuitry, system power supply circuitry, and driver power supply circuitry. The bus low-voltage direct-current power supply structure meets the full-time power supply technical requirement that the generator power output power supply circuit directly supplies power in the early stage and the generator power output power supply circuit outputs voltage which is processed and then supplies power to the outside.

Further, the low-voltage conduction circuit comprises a resistor R1, a resistor R2, an MOS tube M1, a resistor R3, a diode D1, a filter capacitor C1 and a capacitor C2, the high-voltage disconnection circuit comprises a voltage-stabilizing tube DW1, a resistor R4, a capacitor C3 and a thyristor VT1, a drain electrode of the MOS tube M1 and one end of the resistor R1 are both connected with an anode output end of the rectification, filtering and voltage-stabilizing module, a source electrode of the MOS tube M1 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with an anode of the diode D1, a cathode of the diode D1 is used as an anode output end of the switching power supply starting unit for supplying power to the control circuit of the switching power supply module, an anode of the filter capacitor C1 and one end of the capacitor C2 are both connected with a cathode of the diode D1, the negative electrode of the filter capacitor C1 and the other end of the capacitor C2 are both connected with the negative electrode output end of the rectification, filtering and voltage stabilizing module, the grid electrode of the MOS tube M1 and one end of the resistor R2 are both connected with the anode of the thyristor VT1, the other end of the resistor R2 is connected with the other end of the resistor R1, the cathode of the thyristor VT1 is connected with the negative electrode output end of the rectification, filtering and voltage stabilizing module, the negative electrode of the voltage stabilizing tube DW1 is connected with the negative electrode of the diode D1, the positive electrode of the voltage stabilizing tube DW1 is connected with one end of the resistor R4, the other end of the resistor R4 and the gate electrode of the thyristor VT1 are both connected with one end of the capacitor C3, and the other end of the capacitor C3 is connected with the negative electrode output end of the rectification, filtering and voltage stabilizing module.

The utility model adopts the above technical scheme: the starting system of the digital generator inverter switching power supply can achieve the full-time power supply technical effect that the direct power supply is carried out by the three-phase rectified bus direct current of the permanent magnet motor main winding in the early stage and the direct current of the permanent magnet motor main winding in the later stage is processed and then is supplied through the bus low-voltage direct current power supply structure.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic structural diagram of a starting system of a digital generator inverter switching power supply of the present invention;

fig. 2 is a schematic structural diagram of a switching power supply starting unit of a starting system of a digital generator inverter switching power supply of the present invention.

Detailed Description

As shown in fig. 1 and 2, the starting system of the digital generator inverter switching power supply includes a rectification filtering voltage stabilization module 1, a switching power supply module 2, and a switching power supply starting unit 3. The rectifying, filtering and voltage stabilizing module 1 rectifies, filters and converts the alternating-current voltage output by the generator into a smooth direct-current voltage and performs voltage stabilization regulation to provide power. The switch power supply module 2 supplies power to a load, and the load comprises an igniter power supply circuit, a system power supply circuit and a driving power supply circuit; the switching power supply module 2 includes a transformer and a control circuit. The transformer is used for processing the high-voltage direct current output by the rectifying, filtering and voltage stabilizing module 1 into low-voltage direct current so as to supply power to the control circuit and supply power to the load, and the control circuit is used for controlling the process of supplying power to the load by the transformer.

The switching power supply starting unit 3 supplies power to the control circuit of the switching power supply module 2 when the rectifying, filtering and voltage stabilizing module 1 outputs a low voltage, and stops supplying power to the control circuit of the switching power supply module 2 when the rectifying, filtering and voltage stabilizing module 1 outputs a high voltage. The input end of the transformer of the switch power supply module 2 is connected with the rectification, filtering and voltage stabilization module 1. The transformer is connected with the control circuit and supplies power to the control circuit by the transformer. The transformer is provided with an output end for supplying power to the load. The switching power supply starting unit 3 includes a low-voltage on circuit and a high-voltage off circuit. The input end of the low-voltage conduction circuit is connected with the rectification, filtering and voltage stabilization module 1, and the output end of the low-voltage conduction circuit is connected with the control circuit. The low-voltage conduction circuit supplies power to the control circuit of the switching power supply module 2 when the rectification and filtering voltage stabilizing module 1 outputs low voltage, and the high-voltage disconnection circuit disconnects the low-voltage conduction circuit when the rectification and filtering voltage stabilizing module 1 outputs high voltage so that the low-voltage conduction circuit stops supplying power to the control circuit of the switching power supply module 2.

The low-voltage conduction circuit comprises a resistor R1, a resistor R2, an MOS tube M1, a resistor R3, a diode D1, a filter capacitor C1 and a capacitor C2. The high-voltage disconnection circuit comprises a voltage-stabilizing tube DW1, a resistor R4, a capacitor C3 and a thyristor VT1. Specifically, the drain of the MOS transistor M1 and one end of the resistor R1 are both connected to the positive output end of the rectifying, filtering and voltage stabilizing module 1, the source of the MOS transistor M1 is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to the positive electrode of the diode D1. The cathode of the diode D1 serves as the anode output end of the switching power supply starting unit 3 for supplying power to the control circuit of the switching power supply module 2. Since the transformer also supplies power to the control circuit, the positive output terminal of the control circuit on the transformer is connected in parallel with the positive output terminal of the control circuit on the switching power supply starting unit 3. The anode of the filter capacitor C1 and one end of the capacitor C2 are both connected with the cathode of the diode D1, the cathode of the filter capacitor C1 and the other end of the capacitor C2 are both connected with the cathode output end of the rectification and filtering voltage stabilizing module 1, the gate of the MOS tube M1 and one end of the resistor R2 are both connected with the anode of the thyristor VT1, the other end of the resistor R2 is connected with the other end of the resistor R1, the cathode of the thyristor VT1 is connected with the cathode output end of the rectification and filtering voltage stabilizing module 1, the cathode of the voltage stabilizing tube DW1 is connected with the cathode of the diode D1, the anode of the voltage stabilizing tube DW1 is connected with one end of the resistor R4, the other end of the resistor R4 and the gate of the thyristor VT1 are both connected with one end of the capacitor C3, and the other end of the capacitor C3 is connected with the cathode output end of the rectification and filtering voltage stabilizing module 1.

When the internal combustion engine of the generator is started by hand, the rotating speed of the main shaft is very low, and low-voltage three-phase alternating current generated by the generator is transmitted to the rectification filtering voltage-stabilizing module 1 for processing, and then the rectification filtering voltage-stabilizing module 1 outputs low-voltage direct current. Because the voltage of the low-voltage direct current is too low, the direct current processed by the transformer is not enough to drive the control circuit of the switching power supply module 2 to work normally, and at the moment, the low-voltage direct current bypasses the transformer through the low-voltage conduction circuit and is directly supplied to the control circuit, so that the normal work of the control circuit is ensured, and the transformer is controlled to supply power to the outside. Firstly, after the rectifying, filtering and voltage stabilizing module 1 outputs low-voltage direct current to enter the switching power supply starting unit 3, the grid of the MOS transistor M1 is pulled up through the resistor R1 and the resistor R2 to be raised until the MOS transistor M1 is conducted. The low-voltage direct current is output to the control circuit at the anode output end through the MOS tube M1, the resistor R3, the diode D1, the filter capacitor C1 and the capacitor C2.

When the rotating speed of the internal combustion engine part of the generator is gradually increased, the high-voltage three-phase alternating current generated by the generator is transmitted to the rectification filtering voltage stabilizing module 1 and then processed, and the rectification filtering voltage stabilizing module 1 outputs high-voltage direct current. The direct current of the high-voltage direct current after being processed by the transformer can drive the control circuit of the switching power supply module 2 to normally work, so that the switching power supply module 2 can normally work under the drive of the high-voltage direct current at the moment, and the low-voltage conduction circuit is internally disconnected, so that the high-voltage direct current cannot be directly transmitted to the control circuit. After the high-voltage direct current drives the switching power supply module 2 to work, the high-voltage direct current is transformed and rectified by a transformer of the switching power supply module 2 and then supplies power to a load. At the moment, the voltage at the output end supplying power to the control circuit exceeds the voltage of the voltage stabilizing tube DW1 and exceeds partial voltage to drive the thyristor VT1 to be conducted, the grid electrode of the MOS tube M1 is pulled down by the thyristor VT1, and the grid electrode of the MOS tube M1 is cut off, so that a path directly connected between the rectification filtering voltage stabilizing module 1 and the control circuit is disconnected, and the high-voltage direct current output by the rectification filtering voltage stabilizing module 1 is prevented from being directly transmitted to the control circuit.

Claims (2)

1. A starting system of a digital generator inverter switching power supply is characterized in that: the starting system of the inverter switching power supply of the digital generator comprises a rectifying, filtering and voltage-stabilizing module (1), a switching power supply module (2) and a switching power supply starting unit (3), wherein the rectifying, filtering and voltage-stabilizing module (1) rectifies and filters alternating-current voltage output by the generator to be converted into smooth direct-current voltage and performs voltage-stabilizing regulation to provide power supply, the switching power supply module (2) supplies power to a load, the switching power supply module (2) comprises a transformer and a control circuit, the switching power supply starting unit (3) supplies power to the control circuit of the switching power supply module (2) when the rectifying, filtering and voltage-stabilizing module (1) outputs low voltage and stops supplying power to the control circuit of the switching power supply module (2) when the rectifying, filtering and voltage-stabilizing module (1) outputs high voltage, the input end of a transformer of the switching power supply module (2) is connected with the rectification, filtering and voltage stabilizing module (1), the transformer is connected with the control circuit and is supplied with power to the control circuit by the transformer, the transformer is also provided with an output end for supplying power to a load, the switching power supply starting unit (3) comprises a low-voltage conducting circuit and a high-voltage disconnecting circuit, the input end of the low-voltage conducting circuit is connected with the rectification, filtering and voltage stabilizing module (1), the output end of the low-voltage conducting circuit is connected with the control circuit, the low-voltage conducting circuit supplies power to the control circuit of the switching power supply module (2) when the rectification, filtering and voltage stabilizing module (1) outputs low voltage, and the high-voltage disconnecting circuit disconnects the low-voltage conducting circuit when the rectification, filtering and voltage stabilizing module (1) outputs high voltage to enable low-voltage conduction The circuit stops supplying power to the control circuit of the switching power supply module (2).

2. The system for starting a digital generator inverter switching power supply as described in claim 1, wherein: the low-voltage conducting circuit comprises a resistor R1, a resistor R2, an MOS tube M1, a resistor R3, a diode D1, a filter capacitor C1 and a capacitor C2, the high-voltage disconnecting circuit comprises a voltage stabilizing tube DW1, a resistor R4, a capacitor C3 and a thyristor VT1, one end of a drain electrode of the MOS tube M1 and one end of the resistor R1 are both connected with an anode output end of a rectification and filtering voltage stabilizing module (1), a source electrode of the MOS tube M1 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with an anode of the diode D1, a cathode of the diode D1 is used as an anode output end of a switching power supply starting unit (3) for supplying power to a control circuit of the switching power supply module (2), an anode of the filter capacitor C1 and one end of the capacitor C2 are both connected with a cathode of the diode D1, the negative electrode of the filter capacitor C1 and the other end of the capacitor C2 are both connected with the negative electrode output end of the rectification and filtering voltage stabilizing module (1), the grid electrode of the MOS tube M1 and one end of the resistor R2 are both connected with the anode of the thyristor VT1, the other end of the resistor R2 is connected with the other end of the resistor R1, the cathode of the thyristor VT1 is connected with the negative electrode output end of the rectification and filtering voltage stabilizing module (1), the negative electrode of the voltage stabilizing tube DW1 is connected with the negative electrode of the diode D1, the positive electrode of the voltage stabilizing tube DW1 is connected with one end of the resistor R4, the other end of the resistor R4 and the gate electrode of the thyristor VT1 are both connected with one end of the capacitor C3, and the other end of the capacitor C3 is connected with the negative electrode output end of the rectification and filtering voltage stabilizing module (1).

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