WO2016187894A1

WO2016187894A1 - Inverter having expandable and combinable power module

Info

Publication number: WO2016187894A1
Application number: PCT/CN2015/080593
Authority: WO
Inventors: 黄风太
Original assignee: 中山大洋电机股份有限公司
Priority date: 2015-05-27
Filing date: 2015-06-02
Publication date: 2016-12-01
Also published as: CN106301003A

Abstract

An inverter having an expandable and combinable power module comprises a microprocessor, a power module and a drive circuit. The power module is connected to the microprocessor via the drive circuit, and the microprocessor drives the power module via the drive circuit. The inverter is characterized in that a number, M, of the power modules is variable and has a range between 3 and N, and N is an integer greater than 3. The number, M, of the power modules is determined according to a load, and after the number, M, of the power modules is determined, the power modules can be combined to adapt to different loads. The inverter is applicable to a variety of different loads, flexible and convenient, has high versatility, and can shorten the development cycle and reduce development costs.

Description

Inverter with expandable combinable power modules

Technical field:

The invention relates to an inverter with an expandable combinable power module, belonging to a motor drive system, in particular to the field of new energy electric vehicles.

Background technique:

The present invention relates to an electric vehicle such as a hybrid vehicle or a battery electric vehicle. The electric vehicle includes an electric motor and an inverter driven by a high voltage battery, and the electric vehicle may also contain a high voltage DC/DC converter. Specifically, it includes types of multiphase motors and multiphase inverters, such as 3-phase, 6-phase, 9-phase automotive motors and inverters.

Electric vehicles include electric drive systems (inverters) and traction motors (stator + rotors). The electric drive systems of each type of hybrid or battery electric vehicles are different, due to different power, speed, torque, current, etc. The requirements of the inverter hardware and software have different requirements, such as the following problems: 1) versatility is not strong, increase management costs (because the model of the electric drive system is bound to be many; 2) based on the original electric drive system, reverse The transformers are not expandable and combinable, ie once the load (motor or other) changes, the original inverter is not suitable and must be redeveloped, resulting in a significant increase in development time and development costs.

Summary of the invention:

The object of the present invention is to provide an inverter with an expandable and combinable power module, which can flexibly expand and combine according to different loads, is applicable to a plurality of different loads, is flexible and convenient, has high versatility, can shorten development cycle, and reduces development. Cost, reduce product models, reduce management costs, and facilitate maintenance.

The object of the present invention is achieved by the following technical solutions:

The inverter with the expandable combinable power module comprises a microprocessor, a power module and a driving circuit, and the power module is connected to the microprocessor through a driving circuit, and the microprocessor drives the power module through the driving circuit, wherein the power module is characterized by: The number M is variable, ranging from 3 to N, N being an integer greater than 3, and the number M of power modules is determined according to load requirements.

After the values of the number M of power modules described above are determined, the power modules can be combined to accommodate different loads.

Each of the power modules described above is connected to the microprocessor through a driving circuit, and the microprocessor drives one power module through one driving circuit.

The power modules described above are single-phase half-bridge structures consisting of an electronic switch of the upper half bridge and an electronic switch of the lower half bridge.

The electronic switch of the upper half bridge and the electronic switch of the lower half bridge described above are all IGBTs, and the emitter of the IGBT of the upper half bridge and the collector of the IGBT of the lower half bridge are connected and lead out, and the IGBT of the upper half bridge The collector and gate lead-out pins, the lower half of the IGBT's gate and emitter lead-out pins.

The electronic switch of the upper half bridge and the electronic switch of the lower half bridge described above are both MOSFETs, the source of the MOSFET of the upper half bridge and the drain of the MOSFET of the lower half bridge are connected and lead out, and the MOSFET of the upper half bridge The drain and gate are pulled out of the pin, and the lower half of the MOSFET's gate and source are pulled out of the pin.

The microprocessor described above invokes different operating program modules according to different loads to accommodate changes in the number of power modules.

The microprocessor described above stores a plurality of running program modules, and each running program module corresponds to a load.

Only one running program module is stored in the microprocessor described above, and the new running program module is rewritten each time the load is replaced.

When the microprocessor controls nine power modules, the load is: one 9-phase motor, or three independent 3-phase motors, or one 3-phase motor and one 6-phase motor, or 1 set of 3 3-phase motors, or 1 3-phase motor, or 1 3-phase motor and 1 dual 3-phase motor, or 1 6-phase motor and 1 3-phase inductor, or 1 double 3-phase motor and one 3-phase inductor, or two 3-phase motors and one 3-phase inductor.

When the microprocessor controls six power modules as described above, the load is: one 6-phase motor, or two independent 3-phase motors, or one dual 3-phase motor, or one 3-phase. Motor and a 3-phase inductor.

When the microprocessor controls four power modules as described above, the load is one 3-phase motor and one single-phase inductor.

The driving circuit described above is integrated with the power module, and the two output ends of the driving circuit are respectively connected to the electronic switch of the upper half bridge and the electronic switch of the lower half bridge.

The microprocessor described above is also connected with a parameter detecting circuit. The output end of the microprocessor drives the power module through the driving circuit, and the parameter detecting circuit detects the DC bus voltage, the DC bus current, the motor position signal, the phase current signal, and the motor temperature signal. The temperature signal of the power module sends the above signal to the microprocessor.

The microprocessor, the driving circuit and the parameter detecting circuit are all powered by a power board, and a filter circuit and a DC-DC conversion circuit are arranged on the power board, and the 12VDC or 24VDC power supply is sequentially connected to the filter circuit and the DC-DC conversion circuit, DC -DC The output of the conversion circuit supplies a low voltage DC power supply to each circuit.

Compared with the prior art, the invention has the following effects:

1) The number M of inverter power modules of the present invention is variable, ranging from 3 to N, N is an integer greater than 3, and the number M of power modules is determined according to load requirements, and may be added or Reduce the power module to suit different loads, flexible and convenient, and versatile, which can shorten the development cycle, reduce development costs, reduce product models and reduce management costs;

2) Inverter of the invention After the value of the number M of power modules is determined, the power modules can be combined to accommodate different loads. Flexible, versatile, shortens development cycles and reduces development costs.

3) When a power module is damaged, the traditional method is to scrap the entire inverter. The invention can replace the original damaged power module by expanding the power module. The maintenance is simple, the maintenance price is low, and the entire reverse is avoided. A major loss caused by the transformer.

BRIEF DESCRIPTION OF THE DRAWINGS:

1 is a schematic diagram of the principle of a conventional inverter;

Figure 2 is a circuit diagram corresponding to Figure 1;

Figure 3 is a schematic diagram of the principle of the first embodiment of the present invention;

4 is a schematic diagram of the principle of Embodiment 2 of the present invention;

Figure 5 is a circuit diagram of a power module of the present invention;

6 is a circuit configuration diagram of adding a driving circuit based on FIG. 5;

Figure 7 is a schematic diagram of Application Example 1 of Embodiment 1 of the present invention;

8 is a schematic diagram of Application Example 2 of Embodiment 1 of the present invention;

Figure 9 is a schematic view of an application example 3 of the first embodiment of the present invention;

FIG. 10 is a schematic diagram of Application Example 4 of Embodiment 1 of the present invention; FIG.

11 is a schematic diagram of Application Example 1 of Embodiment 2 of the present invention;

FIG. 12 is a schematic diagram of Application Example 2 of Embodiment 2 of the present invention; FIG.

FIG. 13 is a schematic diagram of Application Example 3 of Embodiment 2 of the present invention; FIG.

Figure 14 is a schematic diagram of Application Example 4 of Embodiment 2 of the present invention;

15 is a schematic diagram of Application Example 5 of Embodiment 2 of the present invention;

16 is a schematic diagram of Application Example 6 of Embodiment 2 of the present invention;

Figure 17 is a schematic diagram of an application example 7 of the second embodiment of the present invention;

18 is a schematic diagram of Application Example 8 of Embodiment 2 of the present invention;

Figure 19 is a schematic view showing an application example 9 of the second embodiment of the present invention;

Figure 20 is a schematic view of a third embodiment of the present invention;

21 is a schematic diagram of an application example 1 of Embodiment 4 of the present invention;

22 is a schematic diagram of an application example 2 of Embodiment 4 of the present invention;

Figure 23 is a schematic view showing Embodiment 5 of the present invention;

Figure 24 is a diagram showing another circuit configuration of the power module of the present invention.

detailed description:

The present invention will now be described in further detail by way of specific embodiments and the accompanying drawings.

As shown in Fig. 1 and Fig. 2, the conventional inverter includes a microprocessor, an electronic switch module, a driving circuit unit and a detecting circuit, the electronic switch module uses an IGBT module, and the IGBT module has 6 IGBTs, which constitute a 3-phase full bridge. The structure is immutable. The six IGBTs are all integrated on one circuit board and are not expandable. Therefore, they cannot be well adapted to different loads and have poor versatility.

Embodiment 1: As shown in FIG. 3, FIG. 5 and FIG. 6, the inverter with the expandable combinable power module of the present invention comprises a microprocessor, a power module and a driving circuit, and the power module is connected to the micro processing through a driving circuit. The microprocessor drives the power module through the driving circuit, wherein the number M of the power modules is variable, ranging from 3 to N, N is an integer greater than 3, and the number of power modules M is determined according to the load needs. The power modules shown in Figures 5 and 6 are single-phase half-bridge structures consisting of an electronic switch of the upper half bridge and an electronic switch of the lower half bridge. The electronic switches of the upper half bridge and the electronic switches of the lower half bridge are both IGBTs. Or other power switching elements, the emitter of the IGBT of the upper half bridge and the collector of the IGBT of the lower half bridge are connected and lead out (as a high voltage output), and the collector and gate of the IGBT of the upper half bridge are led out. The bottom and bottom of the IGBT's gate and emitter lead-out pins. According to the load demand, the number of connected power modules is selected, and the microprocessor calls different running program modules according to different loads. The number M of the power modules in FIG. 3 is equal to 6. After the six power modules are determined, the power modules can be combined to adapt. For each load, each power module has a high voltage output connected to the load. The microprocessor calls different operating program modules according to different loads to accommodate changes in the number of power modules. The microprocessor stores a plurality of running program modules, each running program module corresponding to a load or a microprocessor Only one running program module is stored in it, and the new running program module is rewritten each time the load is replaced.

Application Load Example 1 of Embodiment 1 As shown in FIG. 7, the connected load in the first embodiment is a 6-phase motor, and the high-voltage output terminals of the 6 power modules are respectively connected to the 1-phase coil windings of the 6-phase motor.

Application load example 2 of the first embodiment: As shown in FIG. 8, the connected load in the first embodiment is two independent 3-phase motors, and the high-voltage output terminals of the three power modules are respectively connected to each of the three-phase motors. The phase coil windings, the high voltage outputs of the other three power modules are respectively connected to the coil windings of the other phase of the other three-phase motor.

Application Example 3 of Embodiment 1: As shown in FIG. 9, the connected load in the first embodiment is a 3-phase motor and a 3-phase inductor, and the high-voltage outputs of the three power modules are respectively connected to one 3-phase. The 3-phase coil winding of the motor, the high-voltage output terminals of the other three power modules are respectively connected to another 3-phase inductor coil, and the three power modules and the 3-phase inductor coil form a DC-DC boost circuit.

Application Load Example 4 of Embodiment 1: As shown in FIG. 10, the connected load in the first embodiment is a dual 3-phase motor. The dual 3-phase motor shares a 6-phase coil winding and is divided into two groups. The 6-phase coil winding shares a stator, a rotor and a casing. The two 3-phase coil windings are juxtaposed in the same weld groove of the same stator. On the upper part, the stator, the rotor and the casing are shared, and the six high-voltage output terminals of the six power modules are respectively connected to the coil windings of the respective phases of the dual 3-phase motor.

Embodiment 2: As shown in FIG. 4, FIG. 5 and FIG. 6, the inverter with the expandable combinable power module includes a microprocessor, a power module and a driving circuit, and the power module is connected to the microprocessor through the driving circuit. The processor drives the power module through the driving circuit, wherein the number M of the power modules is variable, ranging from 3 to N, N is an integer greater than 3, and the number M of power modules is according to the load. Need to be determined. The power modules shown in Figures 5 and 6 are single-phase half-bridge structures consisting of an electronic switch of the upper half bridge and an electronic switch of the lower half bridge. The electronic switches of the upper half bridge and the electronic switches of the lower half bridge are both IGBTs. Or other power switching elements, the emitter of the IGBT of the upper half bridge and the collector of the IGBT of the lower half bridge are connected and lead out (as a high voltage output), and the collector and gate of the IGBT of the upper half bridge are led out. The bottom and bottom of the IGBT's gate and emitter lead-out pins. According to the load demand, the number of connected power modules is selected, and the microprocessor calls different running program modules according to different loads. In Figure 4, the number M of power modules is equal to 9, after the 9 power modules are determined, the power modules can be combined. Adapted to different loads, each power module has a high voltage output connected to the load. The microprocessor calls different operating program modules according to different loads to accommodate changes in the number of power modules. The microprocessor stores a plurality of running program modules, each running program module corresponds to a load or only one running program module is stored in the microprocessor, and the new running program module is rewritten each time the load is replaced.

Example 2 Application Load Example 1: As shown in FIG. 11, the connected load in the second embodiment is a 9-phase motor, and the 9 high-voltage outputs of the 9 power modules are respectively connected to the phase coil windings of the 9-phase motor. .

Application Load Example 2 of Embodiment 2: As shown in FIG. 12, the connected load in the second embodiment is a three-phase three-phase motor, and the three 3-phase motor has a nine-phase coil winding and is divided into three groups each having a 3-phase coil winding. The three sets of coil windings share the stator, the rotor and the casing. The three sets of 3-phase coil windings are nested side by side on the same weld groove of the same stator, sharing the stator, the rotor and the casing, and the 9 high-voltage output terminals are respectively connected. The coil windings of each phase of the three 3-phase motor.

Application Example 3 of Embodiment 2: As shown in FIG. 13, the connected load in the second embodiment is three independent 3-phase motors, and the three high-voltage outputs of the three power modules are respectively connected to the first three-phase. The 3-phase coil winding of the motor, the 3 high-voltage outputs of the other 3 power modules are respectively connected to the 3-phase coil winding of the second 3-phase motor, and the three high-voltage outputs of the other three power modules are respectively connected to the third 3-phase coil 3-phase coil winding of the motor.

Application Example 4 of Embodiment 2: As shown in FIG. 14, the connected load in the second embodiment is a 3-phase motor and a 6-phase motor, and 3 high-voltage outputs of the three power modules are respectively connected to one. The coil windings of each phase of the 3-phase motor, and the 6 high-voltage outputs of the remaining 6 power modules are respectively connected to the coil windings of each phase of a 6-phase motor.

Application Example 5 of Embodiment 2: As shown in FIG. 15, the connected load in the second embodiment is a 3-phase motor and a dual 3-phase motor, and the dual 3-phase motor shares a 6-phase coil winding and Divided into two groups, the 6-phase coil windings share the stator, the rotor and the casing. The two sets of 3-phase coil windings are juxtaposed nested on the same welt groove of the same stator, sharing the stator, rotor and casing, and 6 powers. The six high-voltage output terminals of the module are respectively connected to the coil windings of the two-phase motor, and the three high-voltage output terminals of the other three power modules are respectively connected to the coil windings of each phase of one 3-phase motor.

Application load example 6 of the second embodiment: As shown in FIG. 16, the connected load in the second embodiment is a 3-phase inductor and a dual 3-phase motor, and the dual 3-phase motor shares a 6-phase coil winding and Divided into two groups, the 6-phase coil windings share the stator, the rotor and the casing. The two sets of 3-phase coil windings are juxtaposed nested on the same welt groove of the same stator, sharing the stator, rotor and casing, and 6 powers. The six high-voltage output terminals of the module are respectively connected to the coil windings of the two-phase motors, and the three high-voltage output terminals of the other three power modules are respectively connected to the respective phase coils of one 3-phase inductor. Three power modules and one 3-phase inductor form a 3-phase DC-DC boost circuit.

Application Example 7 of Embodiment 2: As shown in FIG. 17, the connected load in the second embodiment is two 3-phase motors and one 3-phase inductor, and three high-voltage outputs of three power modules are respectively connected to one. The coil windings of each phase of the 3-phase motor, and the three high-voltage outputs of the other three power modules are respectively connected to the respective coil windings of the other 3-phase motor, and the remaining three power modes The three high-voltage outputs of the block are respectively connected to each phase coil of a 3-phase inductor, and three power modules and one 3-phase inductor form a 3-phase DC-DC boost circuit.

Application Example 8 of Embodiment 2: As shown in FIG. 18, the connected load in the second embodiment is a 3-phase inductor and a 6-phase motor, wherein the three high-voltage outputs of the three power modules are respectively connected to one. Each phase coil of the 3-phase inductor, the 6 high-voltage outputs of the remaining 6 power modules are respectively connected to the coil windings of a 6-phase motor, 3 power modules and 1 3-phase inductor form a 3-phase DC-DC riser. Pressure circuit.

Application load example 9 of the second embodiment: As shown in FIG. 19, the connected load in the second embodiment is a 3-phase motor, and 9 power modules are combined, each of which is a group of 3, each group of 3 The gates of the IGBTs of the upper half bridge are connected together to input signals, and the gates of the IGBTs of each group of three lower half bridges are connected to input signals together, and the collectors of the IGBTs of each group of three upper half bridges are connected and DC bus connection, the emitters of the IGBTs of each group of 3 lower half bridges are connected and connected to the DC bus, and each group is connected between the emitter of the IGBT of the upper half bridge and the collector of the IGBT of the lower half bridge. The ends are connected and connected to the 3-phase motor 1-phase coil winding. Such a connection method can expand the maximum allowable operating current and voltage. For example, the maximum allowable current of one power module connected to the one-phase winding is 150A, and the maximum allowable current for connecting the three-phase power modules in parallel with the one-phase winding is 450A. To achieve the purpose of expansion.

Embodiment 3: As shown in FIG. 20, FIG. 5 and FIG. 6, the inverter with the expandable combinable power module of the present invention comprises a microprocessor, a power module and a driving circuit, and the power module is connected to the micro processing through a driving circuit. The microprocessor drives the power module through the driving circuit, wherein the number M of the power modules is variable, ranging from 3 to N, N is an integer greater than 3, and the number of power modules M is determined according to the load needs. The power modules shown in Figures 5 and 6 are single-phase half-bridge structures consisting of an electronic switch of the upper half bridge and an electronic switch of the lower half bridge. The electronic switches of the upper half bridge and the electronic switches of the lower half bridge are both IGBTs. Or other power switching elements, the emitter of the IGBT of the upper half bridge and the collector of the IGBT of the lower half bridge are connected and lead out (as a high voltage output), and the collector and gate of the IGBT of the upper half bridge are led out. The bottom and bottom of the IGBT's gate and emitter lead-out pins. According to the load demand, the number of connected power modules is selected, and the microprocessor calls different running program modules according to different loads. The number M of the power modules in FIG. 3 is equal to 4, and after the four power modules are determined, the power modules can be combined. Adapted to different loads, each power module has a high voltage output connected to the load. The microprocessor calls different operating program modules according to different loads to accommodate changes in the number of power modules. The microprocessor stores a plurality of running program modules, and each running program module corresponds to a load or a micro Only one running program module is stored in the processor, and the new running program module is rewritten each time the load is replaced.

The load connected in the third embodiment is a 3-phase motor and a single-phase inductor, wherein three high-voltage outputs of three power modules are respectively connected to the coil windings of one phase of one 3-phase motor, and the other power module is used for connection. The single-phase inductor, the single-phase inductor and one power module form a single-phase DC-DC boost circuit.

The microprocessor is connected with a parameter detecting circuit, and the output end of the microprocessor drives the power module through the driving circuit, and the parameter detecting circuit detects the DC bus voltage, the DC bus current, the motor position signal, the phase current signal, the motor temperature signal, and the temperature of the power module. The signal is sent to the microprocessor, and the microprocessor, the driving circuit and the parameter detecting circuit are all powered by the power board. The power board is provided with a filter circuit and a DC-DC conversion circuit, and the 12VDC or 24VDC power supply is sequentially connected to the filter circuit. And a DC-DC conversion circuit, the output of the DC-DC conversion circuit supplies a low-voltage DC power supply to each circuit.

Embodiment 4: The inverter with the expandable combinable power module of the present invention comprises a microprocessor, a power module and a driving circuit. The power module is connected to the microprocessor through a driving circuit, and the microprocessor drives the power module through the driving circuit. It is characterized in that the number M of power modules is variable, ranging from 3 to N, N is an integer greater than 3, and the number M of power modules is determined according to load requirements. The power modules shown in Figures 5 and 6 are single-phase half-bridge structures consisting of an electronic switch of the upper half bridge and an electronic switch of the lower half bridge. The electronic switches of the upper half bridge and the electronic switches of the lower half bridge are both IGBTs. Or other power switching elements, the emitter of the IGBT of the upper half bridge and the collector of the IGBT of the lower half bridge are connected and lead out (as a high voltage output), and the collector and gate of the IGBT of the upper half bridge are led out. The bottom and bottom of the IGBT's gate and emitter lead-out pins. According to the load demand, the number of connected power modules is selected, and the microprocessor calls different running program modules according to different loads. The number M of the power modules in FIG. 3 is equal to 8, and after the eight power modules are determined, the power modules can be combined to adapt. For each load, each power module has a high voltage output connected to the load. The microprocessor calls different operating program modules according to different loads to accommodate changes in the number of power modules. The microprocessor stores a plurality of running program modules, each running program module corresponds to a load or only one running program module is stored in the microprocessor, and the new running program module is rewritten each time the load is replaced.

Example 4 Application Load Example 1: As shown in FIG. 21, the connected load in the fourth embodiment is a 6-phase motor and a two-phase inductor, wherein three power modules are combined with three power modules to form six high voltages. The output ends are respectively connected to a 6-phase coil winding of a 6-phase motor, and the remaining 2 power modules are used to connect two-phase inductors. The two-phase inductor and two power modules form a two-phase DC-DC boost circuit.

Application load example 2 of the fourth embodiment: As shown in FIG. 22, the connected load in the fourth embodiment is two 3-phase motors. The three high-voltage outputs of the three power modules are respectively connected to the 3-phase coil winding of a 3-phase motor, and the three high-voltage outputs of the three power modules are respectively connected to the 3-phase coil windings of the other 3-phase motor, and the other two The power module is used to connect two-phase inductors, and the two-phase inductor and two power modules form a two-phase DC-DC boost circuit.

Embodiment 5: The inverter with the expandable combinable power module of the present invention comprises a microprocessor, a power module and a driving circuit, and the power module is connected to the microprocessor through a driving circuit, and the microprocessor drives the power module through the driving circuit. It is characterized in that the number M of power modules is variable, ranging from 3 to N, N is an integer greater than 3, and the number M of power modules is determined according to load requirements. The power modules shown in Figures 5 and 6 are single-phase half-bridge structures consisting of an electronic switch of the upper half bridge and an electronic switch of the lower half bridge. The electronic switches of the upper half bridge and the electronic switches of the lower half bridge are both IGBTs. Or other power switching elements, the emitter of the IGBT of the upper half bridge and the collector of the IGBT of the lower half bridge are connected and lead out (as a high voltage output), and the collector and gate of the IGBT of the upper half bridge are led out. The bottom and bottom of the IGBT's gate and emitter lead-out pins. According to the load demand, the number of connected power modules is selected, and the microprocessor calls different running program modules according to different loads. The number M of the power modules in FIG. 3 is equal to 10, and after the 10 power modules are determined, the power modules can be combined to adapt. For each load, each power module has a high voltage output connected to the load. The microprocessor calls different operating program modules according to different loads to accommodate changes in the number of power modules. The microprocessor stores a plurality of running program modules, each running program module corresponds to a load or only one running program module is stored in the microprocessor, and the new running program module is rewritten each time the load is replaced.

Example 5 Application Load Example 1: As shown in FIG. 23, the connected load in the fifth embodiment is three independent 3-phase motors and single-phase inductors, and three high-voltage outputs of the three power modules are respectively connected. The 3-phase coil winding of a 3-phase motor, the three high-voltage outputs of the other three power modules are respectively connected to the 3-phase coil winding of the second 3-phase motor, and the remaining 4 power modules select 3 power modules, 3 One high-voltage output terminal is respectively connected to the 3-phase coil winding of the third 3-phase motor, and the remaining one power module is used to connect the single-phase inductor, and the single-phase inductor and one power module constitute a single-phase DC-DC boost circuit .

In the above embodiments, the number of power modules of the original inverter is three, but it should not be limited to three, and may be six, five, four, twelve, etc., and the number is not limited.

Embodiment 6: A motor comprising a motor body and an inverter, the motor body being driven by an inverter, the motor body comprising a stator assembly, a rotor assembly and a casing, the stator assembly comprising a stator core and a coil winding, the inverse An inverter with an expandable combinable power module, including an inverter with a scalable combinable power module, including a microprocessor, The power module, the driving circuit, and the power module are connected to the microprocessor through a driving circuit, and the microprocessor drives the power module through the driving circuit, wherein the number M of the power modules is variable, and the range is from 3 to N. In the range, N is an integer greater than 3, and the number M of power modules is determined according to load requirements. The power modules shown in Figures 5 and 6 are single-phase half-bridge structures consisting of an electronic switch of the upper half bridge and an electronic switch of the lower half bridge. The electronic switches of the upper half bridge and the electronic switches of the lower half bridge are both IGBTs. Or other power switching elements, the emitter of the IGBT of the upper half bridge and the collector of the IGBT of the lower half bridge are connected and lead out (as a high voltage output), and the collector and gate of the IGBT of the upper half bridge are led out. The bottom and bottom of the IGBT's gate and emitter lead-out pins. According to the load needs, the number of connected power modules is selected, and the microprocessor calls different running program modules according to different loads.

The embodiments described above are only a few typical embodiments. Since the number M of different power modules of the load is constantly changing, all the embodiments cannot be exhaustive, and it should be inferred by those skilled in the art from the above facts. The number M of power modules of the present invention can be continuously expanded. For example, the number M of power modules is 15 for driving independent 5-band 3-phase motors, and for example, the number M of power modules is 18, of which 15 power modules It is used to drive independent 5-band 3-phase motors, and the remaining 3 power modules are used to connect three-phase inductors. The three-phase inductor and three power modules form a three-phase DC-DC boost circuit.

The electronic switch used in the power module of FIG. 5 of the present invention is an IGBT, and these IGBTs can be replaced by MOSFETs (commonly known as MOS tubes), as shown in FIG. 24, the electronic switches of the upper half bridge and the electronic switches of the lower half bridge are both The MOSFET, the source of the MOSFET of the upper half bridge and the drain of the MOSFET of the lower half bridge are connected and lead out (as a high voltage output), the drain and gate of the MOSFET of the upper half bridge are taken out, and the lower half of the bridge The gate and source of the MOSFET are pulled out of the pin.

Claims

The inverter with the expandable combinable power module comprises a microprocessor, a power module and a driving circuit, and the power module is connected to the microprocessor through a driving circuit, and the microprocessor drives the power module through the driving circuit, wherein the power module is characterized by: The number M is variable, ranging from 3 to N, N being an integer greater than 3, and the number M of power modules is determined according to load requirements.
The inverter with an expandable combinable power module according to claim 1, characterized in that after the value of the number M of power modules is determined, the power modules can be combined to adapt to different loads.
The inverter with expandable combinable power modules according to claim 2, wherein each power module is connected to the microprocessor through a driving circuit, and the microprocessor drives one power through one driving circuit. Module.
The inverter with expandable combinable power modules according to claim 3, wherein the power modules are single-phase half-bridge structures composed of an electronic switch of an upper half bridge and an electronic switch of a lower half bridge. .
The inverter with an expandable combinable power module according to claim 4, wherein the electronic switch of the upper half bridge and the electronic switch of the lower half bridge are both IGBTs, emitters of the upper half bridge IGBT and lower The collector of the half-bridge IGBT is connected and leads out, the collector and gate of the IGBT of the upper half of the bridge, and the gate and emitter of the IGBT of the lower half of the bridge.
The inverter with an expandable combinable power module according to claim 4, wherein the electronic switch of the upper half bridge and the electronic switch of the lower half bridge are both MOSFETs, the source and the bottom of the MOSFET of the upper half bridge The drains of the half-bridge MOSFETs are connected and led out, the drain and gate of the MOSFET of the upper half of the bridge, and the gate and source of the MOSFET of the lower half of the bridge.
The inverter with an expandable combinable power module according to claim 5 or 6, characterized in that the microprocessor calls different operating program modules according to different loads to adapt to changes in the number of power modules.
The inverter with an expandable combinable power module according to claim 7, wherein the microprocessor stores a plurality of running program modules, each running program module corresponding to a load.
The inverter with an expandable combinable power module according to claim 7, wherein only one running program module is stored in the microprocessor, and the new running program module is rewritten each time the load is replaced.
An inverter with an expandable combinable power module according to any one of claims 1 to 3, characterized in that when the microprocessor controls nine power modules, the load is: one 9-phase motor, or It is 3 independent 3 Phase motor, either a 3-phase motor and a 6-phase motor, or a 3-phase 3-phase motor, or a 3-phase motor, or a 3-phase motor and a dual 3-phase motor, or It is a 6-phase motor and a 3-phase inductor, or a dual 3-phase motor and a 3-phase inductor, or two 3-phase motors and a 3-phase inductor.
An inverter with an expandable combinable power module according to any one of claims 1 to 3, characterized in that when the microprocessor controls six power modules, the load is: one 6-phase motor, or Two independent 3-phase motors, or one dual 3-phase motor, or one 3-phase motor and one 3-phase inductor.
An inverter with an expandable combinable power module according to any one of claims 1 to 3, characterized in that when the microprocessor controls four power modules, the load is one 3-phase motor and one single Phase inductor.
The inverter with an expandable combinable power module according to claim 4, wherein the driving circuit is integrated with the power module, and the two output ends of the driving circuit are respectively connected to the electronic switch and the lower half of the upper half bridge. The electronic switch of the bridge.
The inverter with an expandable combinable power module according to claim 5 or 6, wherein the microprocessor is further connected with a parameter detecting circuit, and the output end of the microprocessor drives the power module through the driving circuit, and the parameter is detected. The circuit detects the DC bus voltage, the DC bus current, the motor position signal, the phase current signal, the motor temperature signal, the temperature signal of the power module, and sends the above signal to the microprocessor.
The inverter with an expandable combinable power module according to claim 13, wherein the microprocessor, the driving circuit and the parameter detecting circuit are all powered by a power board, and a filter circuit and a DC-DC are arranged on the power board. The conversion circuit, 12VDC or 24VDC power supply is connected to the filter circuit and the DC-DC conversion circuit in turn, and the output of the DC-DC conversion circuit supplies low-voltage DC power to each circuit.