Three-phase inverter with wide voltage output range based on diode clamp

Abstract

The utility model relates to the technical field of inverters, in particular to a three-phase inverter with a wide voltage output range based on diode clamping. The inverter based on the three-phase voltage source comprises a direct-current voltage source module, a Y-Inverter inversion module, an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) control module and a PMSM (Permanent Magnet Synchronous Motor) load module. The power supply has the characteristics of wide output voltage range and low harmonic wave, and is very wide in application prospect. Compared with a conventional inverter, the inverter provided by the utility model employs a Y-type inversion structure, obtains wide-range voltage output, has better performance in the field of electric automobiles, can be compatible with voltage levels of various nominal batteries, and meanwhile, compared with a two-level inverter, the inverter provided by the utility model is smoother in output waveform, and is more stable in performance. The output voltage is close to sine waves, peripheral circuit interference is small, and the device is safer, more efficient, more stable and quite wide in application prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to inverter technology field, concretely relates to a kind of three-phase inverter of wide output voltage range based on diode clamping. BACKGROUND

[0002] Nowadays, the development of fuel cell and electric vehicle lithium battery industry is rapid, and the requirements of inverter are also improved. The inverter is a power electronic device that can convert DC into AC. The commonly used three-phase inverters include Z-source inverter (Z-VSI), B-source inverter (B-VSI), current source inverter and voltage source inverter. The motor drive powered by fuel cell requires high performance, and the inverter must cope with the wide DC voltage variation of the fuel cell for motor drive power supply, and also output high-quality motor voltage. The traditional inverter contains two energy levels, which greatly increases the loss.

[0003] In order to solve the above problems, the utility model provides a kind of three-phase inverter of wide voltage output range based on diode clamping. CONTENT OF UTILITY MODEL

[0004] The utility model aims to provide a kind of three-phase inverter of wide voltage output range based on diode clamping, to solve the problem that traditional three-phase inverter cannot realize wide output voltage range.

[0005] The technical scheme adopted by the utility model is as follows: a kind of three-phase inverter of wide voltage output range based on diode clamping, including DC voltage source module, Y-Inverter inverter module, MOSFET control module, PMSM load module;Its characterized in that DC voltage source module output is connected with Y-Inverter inverter module input, MOSFET control module output is connected with Y-Inverter inverter module input, Y-Inverter inverter module output is connected with PMSM load module input;The DC voltage source module includes voltage source V dcThe Y-Inverter module includes crystal switches T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, body switch T23, T24, diodes D1, D2, and D3. Diodes D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24, D25, D26, D27, D28, D29, D30, D31, D32, D33, D34, D35, D36; Inductors L1, L2, L3; Capacitor C i Capacitors C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, Ca, Cb, and Cc; the voltage source V of the DC voltage source module. dc The positive terminal and the capacitor C of the Y-Inverter module i Positive terminals connected, voltage source V dc The negative terminal is connected to the capacitor C of the Y-Inverter module. i The negative terminals are connected.

[0006] The MOSFET control module outputs 24 control signals, with output interfaces for MOSFETs T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, and T24.

[0007] The Y-Inverter module, the gate of the transistor T1 is connected with the T1 output interface of the MOSFET control module, the source is connected with the capacitor C i The gate of the transistor T2 is connected with the T2 output interface of the MOSFET control module, the source is connected with the anode of the diode D2 and the anode of the diode D25, the drain is connected with the cathode of the diode D2 and the positive pole of the inductor L1, the cathode of the diode D25 is connected with the positive pole of the capacitor C1 and the negative pole of the capacitor C2 and the anode of the diode D26, the gate of the transistor T3 is connected with the T3 output interface of the MOSFET control module, the source is connected with the anode of the diode D3 and the positive pole of the inductor L1, the drain is connected with the cathode of the diode D3 and the cathode of the diode D26, the gate of the transistor T4 is connected with the T4 output interface of the MOSFET control module, the source is connected with the anode of the diode D4 and the cathode of the diode D26, the drain is connected with the cathode of the diode D4 and the positive pole of the capacitor C i The gate of the transistor T5 is connected with the T5 output interface of the MOSFET control module, the source is connected with the anode of the diode D5 and the negative pole of the capacitor C3 and the negative pole of the capacitor Ca, the drain is connected with the anode of the diode D31 and the cathode of the diode D5, the gate of the transistor T6 is connected with the T6 output interface of the MOSFET control module, the source is connected with the anode of the diode D6 and the anode of the diode D31, the drain is connected with the cathode of the diode D6 and the negative pole of the inductor L1, the cathode of the diode D31 is connected with the positive pole of the capacitor C3 and the negative pole of the capacitor C4 and the anode of the diode D32, the gate of the transistor T7 is connected with the T7 output interface of the MOSFET control module, the source is connected with the anode of the diode D7 and the negative pole of the inductor L1, the drain is connected with the cathode of the diode D7 and the cathode of the diode D32, the gate of the transistor T8 is connected with the T8 output interface of the MOSFET control module, the source is connected with the anode of the diode D8 and the cathode of the diode D32, the drain is connected with the cathode of the diode D8 and the positive pole of the capacitor C4 and the positive pole of the capacitor Ca, the gate of the transistor T9 is connected with the T9 output interface of the MOSFET control module, the source is connected with the capacitor C iThe negative electrode is connected with the anode of diode D9 and the negative electrode of capacitor C5, the drain electrode is connected with the anode of diode D27 and the cathode of diode D9, the gate electrode of transistor T10 is connected with the T10 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D10 and the anode of diode D27, and the drain electrode is connected with the cathode of diode D10 and the positive electrode of inductor L2, the cathode of diode D27 is connected with the positive electrode of capacitor C5 and the negative electrode of capacitor C6 and the anode of diode D28, the gate electrode of transistor T11 is connected with the T11 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D11 and the positive electrode of inductor L2, and the drain electrode is connected with the cathode of diode D11 and the cathode of diode D28, the gate electrode of transistor T12 is connected with the T12 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D12 and the cathode of diode D28, and the drain electrode is connected with the cathode of diode D12 and the positive electrode of capacitor C i The positive electrode is connected with the positive electrode of capacitor C6, the gate electrode of transistor T13 is connected with the T13 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D13 and the negative electrode of capacitor C7 and the negative electrode of capacitor Cb, and the drain electrode is connected with the anode of diode D33 and the cathode of diode D13, the gate electrode of transistor T14 is connected with the T14 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D14 and the anode of diode D33, and the drain electrode is connected with the cathode of diode D14 and the negative electrode of inductor L2, the cathode of diode D33 is connected with the positive electrode of capacitor C7 and the negative electrode of capacitor C8 and the anode of diode D34, the gate electrode of transistor T15 is connected with the T15 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D15 and the negative electrode of inductor L2, and the drain electrode is connected with the cathode of diode D15 and the cathode of diode D34, the gate electrode of transistor T16 is connected with the T16 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D16 and the cathode of diode D34, and the drain electrode is connected with the cathode of diode D16 and the positive electrode of capacitor C8 and the positive electrode of capacitor Cb, the gate electrode of transistor T17 is connected with the T17 output interface of the MOSFET control module, the source electrode is connected with the positive electrode of capacitor C iThe negative terminal of transistor T18 is connected to the anode of diode D17 and the negative terminal of capacitor C9; the drain is connected to the anode of diode D29 and the cathode of diode D17. The gate of transistor T18 is connected to the T18 output interface of the MOSFET control module; the source is connected to the anode of diode D18 and the anode of diode D29; the drain is connected to the cathode of diode D18 and the positive terminal of inductor L3. The cathode of diode D29 is connected to the positive terminal of capacitor C9, the negative terminal of capacitor C10, and the anode of diode D30. The gate of transistor T19 is connected to the T19 output interface of the MOSFET control module; the source is connected to the anode of diode D19 and the positive terminal of inductor L3; the drain is connected to the cathodes of diode D19 and diode D30. The gate of transistor T20 is connected to the T20 output interface of the MOSFET control module; the source is connected to the anode of diode D20 and the cathode of diode D30; the drain is connected to the cathode of diode D20 and capacitor C17. i The positive terminal of transistor T21 is connected to the positive terminal of capacitor C10. The gate of transistor T21 is connected to the output interface of T21 of the MOSFET control module. The source of T21 is connected to the anode of diode D21, the negative terminal of capacitor C11, and the negative terminal of capacitor Cc. The drain of T22 is connected to the anode of diode D35 and the cathode of diode D21. The gate of transistor T22 is connected to the output interface of T22 of the MOSFET control module. The source of T22 is connected to the anode of diode D22 and the anode of diode D35. The drain of T22 is connected to the cathode of diode D22 and the negative terminal of inductor L3. The cathode of diode D35 is connected to capacitor C10. 1. The positive terminal of transistor T23 is connected to the negative terminal of capacitor C12 and the anode of diode D36. The gate of transistor T23 is connected to the output interface of T23 of the MOSFET control module, the source is connected to the anode of diode D23 and the negative terminal of inductor L3, and the drain is connected to the cathodes of diode D23 and diode D36. 2. The gate of transistor T24 is connected to the output interface of T24 of the MOSFET control module, the source is connected to the anode of diode D24 and the cathode of diode D36, and the drain is connected to the cathode of diode D24, the positive terminal of capacitor C12, and the positive terminal of capacitor Cc. i Positive electrode and voltage source V i Positive terminals connected, capacitor C i The negative terminals are connected to the negative terminals of capacitors Ca, Cb, and Cc. Input port a of the PMSM load module is connected to the positive terminal of capacitor Ca in the Y-Inverter module; input port b of the PMSM load module is connected to the positive terminal of capacitor Cb in the Y-Inverter module; and input port c of the PMSM load module is connected to the positive terminal of capacitor Cc in the Y-Inverter module.

[0008] The utility model discloses a three -phase inverter of wide voltage output range based on diode clamping's advantage lies in: first, in the inverter bridge part, the application has been connected to a public "Y" point with three same DC / DC converter of different connection of traditional inverter, second, add diode clamping mechanism in inverter topological structure, make the inverter of utility model discloses output waveform more close to sine compared with ordinary two -level inverter, and can realize wide voltage range output.

[0009] In order to more clearly illustrate the utility model discloses a three -phase inverter of wide voltage output range based on diode clamping, below combining with the specific embodiment of the utility model makes further detailed description to the utility model. DRAWINGS

[0010] In order to more clearly illustrate the utility model discloses a three -phase inverter of wide voltage output range based on diode clamping, below combining with the specific embodiment of the utility model makes further detailed description to the utility model.

[0011] Figure 1 It is the circuit structure diagram of the utility model discloses a three -phase inverter of wide voltage output range based on diode clamping.

[0012] Figure 2 It is the buck-boost module of a phase in the inverter.

[0013] Figure 3 It is the working mode when output voltage is lower than input voltage.

[0014] Figure 4 It is the working mode when output voltage is higher than input voltage. Specific embodiment

[0015] Below, combining with the drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, should note that the embodiment described here is only the part of the utility model of the embodiment, and not the whole implementation of the utility model of the embodiment, the embodiment is only exemplary.

[0016] Figure 1The utility model relates to a kind of circuit structure diagram of three-phase inverter of wide voltage output range based on diode clamping, and its specific structure is as follows: it includes DC voltage source module, Y-Inverter inverter module, MOSFET control module, PMSM load module;Its characterized in that DC voltage source module output is connected with Y-Inverter inverter module input, MOSFET control module output is connected with Y-Inverter inverter module input, Y-Inverter inverter module output is connected with PMSM load module input;The DC voltage source module includes voltage source V dc ;The Y-Inverter inverter module includes crystal switch tube T1, crystal switch tube T2, crystal switch tube T3, crystal switch tube T4, crystal switch tube T5, crystal switch tube T6, crystal switch tube T7, crystal switch tube T8, crystal switch tube T9, crystal switch tube T10, crystal switch tube T11, crystal switch tube T12, crystal switch tube T13, crystal switch tube T14, crystal switch tube T15, crystal switch tube T16, crystal switch tube T17, crystal switch tube T18, crystal switch tube T19, crystal switch tube T20, crystal switch tube T21, crystal switch tube T22, body switch tube T23, crystal switch tube T24, diode D1, diode D2, diode D3, diode D4, diode D5, diode D6, diode D7, diode D8, diode D9, diode D10, diode D11, diode D12, diode D13, diode D14, diode D15, diode D16, diode D17, diode D18, diode D19, diode D20, diode D21, diode D22, diode D23, diode D24, diode D25, diode D26, diode D27, diode D28, diode D29, diode D30, diode D31, diode D32, diode D33, diode D34, diode D35, diode D36, inductance L1, inductance L2, inductance L3, capacitor C i , capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, capacitor C10, capacitor C11, capacitor C12, capacitor Ca, capacitor Cb, capacitor Cc.

[0017] The voltage source V i of DC voltage source module positive pole is connected with the capacitor C i of Y-Inverter inverter module positive pole, and the voltage source V i negative pole is connected with the capacitor C i of Y-Inverter inverter module negative pole.

[0018] The MOSFET control module outputs 24 control signals, and the output interfaces are MOS T1, MOS T2, MOS T3, MOS T4, MOS T5, MOS T6, MOS T7, MOS T8, MOS T9, MOS T10, MOS T11, MOS T12, MOS T13, MOS T14, MOS T15, MOS T16, MOS T17, MOS T18, MOS T19, MOS T20, MOS T21, MOS T22, MOS T23, and MOS T24.

[0019] In the Y-Inverter module, the gate of the crystal switching tube T1 is connected to the T1 output interface of the MOSFET control module, the source is connected to the anode of the capacitor C i The anode of the diode D1 and the negative electrode of the capacitor C1 are connected to the drain of the crystal switching tube T2, and the cathode of the diode D1 and the anode of the diode D25 are connected to the source of the crystal switching tube T2, and the positive electrode of the inductor L1 is connected to the drain of the crystal switching tube T2, the cathode of the diode D25 is connected to the positive electrode of the capacitor C1 and the negative electrode of the capacitor C2 and the anode of the diode D26, the gate of the crystal switching tube T3 is connected to the T3 output interface of the MOSFET control module, the source is connected to the anode of the diode D3 and the positive electrode of the inductor L1, and the cathode of the diode D3 and the cathode of the diode D26 are connected to the drain of the crystal switching tube T3, the gate of the crystal switching tube T4 is connected to the T4 output interface of the MOSFET control module, the source is connected to the anode of the diode D4 and the cathode of the diode D26, and the cathode of the diode D4 and the positive electrode of the capacitor C i The anode of the diode D1 and the negative electrode of the capacitor C1 are connected to the drain of the crystal switching tube T2, and the cathode of the diode D1 and the anode of the diode D25 are connected to the source of the crystal switching tube T2, and the positive electrode of the inductor L1 is connected to the drain of the crystal switching tube T2, the cathode of the diode D25 is connected to the positive electrode of the capacitor C1 and the negative electrode of the capacitor C2 and the anode of the diode D26, the gate of the crystal switching tube T3 is connected to the T3 output interface of the MOSFET control module, the source is connected to the anode of the diode D3 and the positive electrode of the inductor L1, and the cathode of the diode D3 and the cathode of the diode D26 are connected to the drain of the crystal switching tube T3, the gate of the crystal switching tube T4 is connected to the T4 output interface of the MOSFET control module, the source is connected to the anode of the diode D4 and the cathode of the diode D26, and the cathode of the diode D4 and the positive electrode of the capacitor Ci The negative electrode is connected with the anode of diode D9 and the drain of diode D27, the anode of diode D9 is connected with the cathode of diode D27, the gate of transistor T10 is connected with the T10 output interface of the MOSFET control module, the source is connected with the anode of diode D10 and the anode of diode D27, and the drain is connected with the cathode of diode D10 and the positive electrode of inductor L2, the cathode of diode D27 is connected with the positive electrode of capacitor C5 and the negative electrode of capacitor C6 and the anode of diode D28, the gate of transistor T11 is connected with the T11 output interface of the MOSFET control module, the source is connected with the anode of diode D11 and the positive electrode of inductor L2, and the drain is connected with the cathode of diode D11 and the cathode of diode D28, the gate of transistor T12 is connected with the T12 output interface of the MOSFET control module, the source is connected with the anode of diode D12 and the cathode of diode D28, and the drain is connected with the cathode of diode D12 and the positive electrode of capacitor C i The positive electrode is connected with the positive electrode of capacitor C6, the gate of transistor T13 is connected with the T13 output interface of the MOSFET control module, the source is connected with the anode of diode D13 and the negative electrode of capacitor C7 and the negative electrode of capacitor Cb, and the drain is connected with the anode of diode D33 and the cathode of diode D13, the gate of transistor T14 is connected with the T14 output interface of the MOSFET control module, the source is connected with the anode of diode D14 and the anode of diode D33, and the drain is connected with the cathode of diode D14 and the negative electrode of inductor L2, the cathode of diode D33 is connected with the positive electrode of capacitor C7 and the negative electrode of capacitor C8 and the anode of diode D34, the gate of transistor T15 is connected with the T15 output interface of the MOSFET control module, the source is connected with the anode of diode D15 and the negative electrode of inductor L2, and the drain is connected with the cathode of diode D15 and the cathode of diode D34, the gate of transistor T16 is connected with the T16 output interface of the MOSFET control module, the source is connected with the anode of diode D16 and the cathode of diode D34, and the drain is connected with the cathode of diode D16 and the positive electrode of capacitor C8 and the positive electrode of capacitor Cb, the gate of transistor T17 is connected with the T17 output interface of the MOSFET control module, the source is connected with the positive electrode of capacitor C iThe negative terminal of transistor T18 is connected to the anode of diode D17 and the negative terminal of capacitor C9; the drain is connected to the anode of diode D29 and the cathode of diode D17. The gate of transistor T18 is connected to the T18 output interface of the MOSFET control module; the source is connected to the anode of diode D18 and the anode of diode D29; the drain is connected to the cathode of diode D18 and the positive terminal of inductor L3. The cathode of diode D29 is connected to the positive terminal of capacitor C9, the negative terminal of capacitor C10, and the anode of diode D30. The gate of transistor T19 is connected to the T19 output interface of the MOSFET control module; the source is connected to the anode of diode D19 and the positive terminal of inductor L3; the drain is connected to the cathodes of diode D19 and diode D30. The gate of transistor T20 is connected to the T20 output interface of the MOSFET control module; the source is connected to the anode of diode D20 and the cathode of diode D30; the drain is connected to the cathode of diode D20 and capacitor C17. i The positive terminal of transistor T21 is connected to the positive terminal of capacitor C10. The gate of transistor T21 is connected to the output interface of T21 of the MOSFET control module. The source of T21 is connected to the anode of diode D21, the negative terminal of capacitor C11, and the negative terminal of capacitor Cc. The drain of T22 is connected to the anode of diode D35 and the cathode of diode D21. The gate of transistor T22 is connected to the output interface of T22 of the MOSFET control module. The source of T22 is connected to the anode of diode D22 and the anode of diode D35. The drain of T22 is connected to the cathode of diode D22 and the negative terminal of inductor L3. The cathode of diode D35 is connected to capacitor C10. 1. The positive terminal of transistor T23 is connected to the negative terminal of capacitor C12 and the anode of diode D36. The gate of transistor T23 is connected to the output interface of T23 of the MOSFET control module, the source is connected to the anode of diode D23 and the negative terminal of inductor L3, and the drain is connected to the cathodes of diode D23 and diode D36. 2. The gate of transistor T24 is connected to the output interface of T24 of the MOSFET control module, the source is connected to the anode of diode D24 and the cathode of diode D36, and the drain is connected to the cathode of diode D24, the positive terminal of capacitor C12, and the positive terminal of capacitor Cc. i Positive electrode and voltage source V i Positive terminals connected, capacitor C i The negative terminals are connected to the negative terminals of capacitors Ca, Cb, and Cc. Input port a of the PMSM load module is connected to the positive terminal of capacitor Ca in the Y-Inverter module; input port b of the PMSM load module is connected to the positive terminal of capacitor Cb in the Y-Inverter module; and input port c of the PMSM load module is connected to the positive terminal of capacitor Cc in the Y-Inverter module.

[0020] Next, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4The utility model discloses, first increase 6 groups MOSFET transistor and 24 corresponding freewheeling diode in inverter bridge part, with the different connection of traditional inverter, three identical DC / DC converter are connected to a common "Y" point, Y type inverter bridge part is by three buck-boost module composition, and each module is independently operated, Figure 2 It is a buck-boost module of phase a, and the control strategies of the three modules are independent of each other, which means that the control strategy of the three phases is relatively simple.

[0021] Taking the voltage of phase a as an example, the transistor T7 and the transistor T8 are continuously turned on, the transistor T5 and the transistor T6 are continuously turned off, and the transistor T1, the transistor T2, the transistor T3 and the transistor T4 are alternately turned on and turned off, so that Figure 3 At this time, the buck-boost module of phase a is in the buck mode, and the output voltage is lower than the input voltage; the transistor T3 and the transistor T4 are continuously turned on, the transistor T1 and the transistor T2 are continuously turned off, and the transistor T5, the transistor T6, the transistor T7 and the transistor T8 are alternately turned on and turned off, so that Figure 4 At this time, the buck-boost module of phase a is in the boost mode, and the output voltage is higher than the input voltage. The on-off principles of the remaining two phases are the same.

[0022] Taking Figure 3 As an example, at this time, the buck-boost module of phase a is in the buck mode, and the transistor T1, T2, T3 and T4 are alternately turned on and turned off, and each phase bridge arm has three level states: when the transistor T3 and T4 are turned on, the transistor T1 and T2 are turned off, at this time, the output of phase a is high level; when the transistor T1 and T2 are turned on, the transistor T3 and T4 are turned off, at this time, the output of phase a is low level; when the transistor T3 is turned on alone, the transistor T1, T2 and T4 are turned off, the output of phase a is 0 level, when the transistor T2 is turned on alone, the transistor T1, T3 and T4 are turned off, the output of phase a is also 0 level. When the buck-boost module of phase a works in the boost mode, the level state of each phase bridge arm is also three, which will not be described in detail here. The on-off principles of the remaining two phases are the same. In this way, the direct current passes through the buck-boost module of the Y type inverter, and outputs three-phase alternating current with a wide voltage range. And the three-phase inverter based on diode clamping of the utility model is compared with the two-level inverter, the output waveform is closer to sine, and the harmonic is less under the same switching frequency.

[0023] The above only is the preferred implementation manner of the utility model, but does not use to limit the utility model, for the skilled person in the art without departing from the spirit and scope of the utility model can make various changes and modifications, therefore, the protection scope of the utility model should be limited by the claims.

Claims

1. A diode clamped based three phase inverter with wide voltage output range comprising of DC voltage source module, Y-Inverter inverting module, MOSFET control module, PMSM load module; characterized by The direct current voltage source module is connected with the input of the Y-Inverter inverter module, the MOSFET control module is connected with the input of the Y-Inverter inverter module, and the output of the Y-Inverter inverter module is connected with the input of the load module; the direct current voltage source module comprises a voltage source Vdc; the Y-Inverter inverter module comprises a crystal switch tube T1, a crystal switch tube T2, a crystal switch tube T3, a crystal switch tube T4, a crystal switch tube T5, a crystal switch tube T6, a crystal switch tube T7, a crystal switch tube T8, a crystal switch tube T9, a crystal switch tube T10, a crystal switch tube T11, a crystal switch tube T12, a crystal switch tube T13, a crystal switch tube T14, a crystal switch tube T15, a crystal switch tube T16, a crystal switch tube T17, a crystal switch tube T18, a crystal switch tube T19, a crystal switch tube T20, a crystal switch tube T21, a crystal switch tube T22, a crystal switch tube T23, a crystal switch tube T24, a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a diode D6, a diode D7, a diode D8, a diode D9, a diode D10, a diode D11, a diode D12, a diode D13, a diode D14, a diode D15, a diode D16, a diode D17, a diode D18, a diode D19, a diode D20, a diode D21, a diode D22, a diode D23, a diode D24, a diode D25, a diode D26, a diode D27, a diode D28, a diode D29, a diode D30, a diode D31, a diode D32, a diode D33, a diode D34, a diode D35, a diode D36, an inductor L1, an inductor L2, an inductor L3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor Ca, a capacitor Cb, and a capacitor Cc. i , a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor Ca, a capacitor Cb, and a capacitor Cc.

2. A diode clamped three-phase inverter with wide voltage output range according to claim 1, characterized in that: The positive pole of the voltage source Vdc of the direct current voltage source module is connected with the positive pole of the capacitor Ci of the Y-Inverter inverter module, and the negative pole of the voltage source Vdc is connected with the negative pole of the capacitor Ci of the Y-Inverter inverter module.

3. A diode clamped three-phase inverter with wide voltage output range according to claim 1, characterized in that: The MOSFET control module outputs 24 control signals, and the output interfaces are MOS T1, MOS T2, MOS T3, MOS T4, MOS T5, MOS T6, MOS T7, MOS T8, MOS T9, MOS T10, MOS T11, MOS T12, MOS T13, MOS T14, MOS T15, MOS T16, MOS T17, MOS T18, MOS T19, MOS T20, MOS T21, MOS T22, MOS T23 and MOS T24.

4. A diode clamped three-phase inverter with wide voltage output range according to claim 1, characterized in that: The Y-Inverter module, the gate of the transistor T1 is connected with the T1 output interface of the MOSFET control module, the source is connected with the capacitor C i The gate of the transistor T2 is connected with the T2 output interface of the MOSFET control module, the source is connected with the anode of the diode D2 and the anode of the diode D25, the drain is connected with the cathode of the diode D2 and the positive pole of the inductor L1, the cathode of the diode D25 is connected with the positive pole of the capacitor C1 and the negative pole of the capacitor C2 and the anode of the diode D26, the gate of the transistor T3 is connected with the T3 output interface of the MOSFET control module, the source is connected with the anode of the diode D3 and the positive pole of the inductor L1, the drain is connected with the cathode of the diode D3 and the cathode of the diode D26, the gate of the transistor T4 is connected with the T4 output interface of the MOSFET control module, the source is connected with the anode of the diode D4 and the cathode of the diode D26, the drain is connected with the cathode of the diode D4 and the positive pole of the capacitor C1 and the positive pole of the capacitor C2, the gate of the transistor T5 is connected with the T5 output interface of the MOSFET control module, the source is connected with the anode of the diode D5 and the negative pole of the capacitor C3 and the negative pole of the capacitor Ca, the drain is connected with the anode of the diode D31 and the cathode of the diode D5, the gate of the transistor T6 is connected with the T6 output interface of the MOSFET control module, the source is connected with the anode of the diode D6 and the anode of the diode D31, the drain is connected with the cathode of the diode D6 and the negative pole of the inductor L1, the cathode of the diode D31 is connected with the positive pole of the capacitor C3 and the negative pole of the capacitor C4 and the anode of the diode D32, the gate of the transistor T7 is connected with the T7 output interface of the MOSFET control module, the source is connected with the anode of the diode D7 and the negative pole of the inductor L1, the drain is connected with the cathode of the diode D7 and the cathode of the diode D32, the gate of the transistor T8 is connected with the T8 output interface of the MOSFET control module, the source is connected with the anode of the diode D8 and the cathode of the diode D32, the drain is connected with the cathode of the diode D8 and the positive pole of the capacitor C4 and the positive pole of the capacitor Ca, the gate of the transistor T9 is connected with the T9 output interface of the MOSFET control module, the source is connected with the capacitor C i The negative electrode is connected with the anode of diode D9 and the negative electrode of capacitor C5, the drain electrode is connected with the anode of diode D27 and the cathode of diode D9, the gate electrode of transistor T10 is connected with the T10 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D10 and the anode of diode D27, and the drain electrode is connected with the cathode of diode D10 and the positive electrode of inductor L2, the cathode of diode D27 is connected with the positive electrode of capacitor C5 and the negative electrode of capacitor C6 and the anode of diode D28, the gate electrode of transistor T11 is connected with the T11 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D11 and the positive electrode of inductor L2, and the drain electrode is connected with the cathode of diode D11 and the cathode of diode D28, the gate electrode of transistor T12 is connected with the T12 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D12 and the cathode of diode D28, and the drain electrode is connected with the cathode of diode D12 and the positive electrode of capacitor C1 and the positive electrode of capacitor C6, the gate electrode of transistor T13 is connected with the T13 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D13 and the negative electrode of capacitor C7 and the negative electrode of capacitor Cb, and the drain electrode is connected with the anode of diode D33 and the cathode of diode D13, the gate electrode of transistor T14 is connected with the T14 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D14 and the anode of diode D33, and the drain electrode is connected with the cathode of diode D14 and the negative electrode of inductor L2, the cathode of diode D33 is connected with the positive electrode of capacitor C7 and the negative electrode of capacitor C8 and the anode of diode D34, the gate electrode of transistor T15 is connected with the T15 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D15 and the negative electrode of inductor L2, and the drain electrode is connected with the cathode of diode D15 and the cathode of diode D34, the gate electrode of transistor T16 is connected with the T16 output interface of the MOSFET control module, the source electrode is connected with the anode of diode D16 and the cathode of diode D34, and the drain electrode is connected with the cathode of diode D16 and the positive electrode of capacitor C8 and the positive electrode of capacitor Cb, the gate electrode of transistor T17 is connected with the T17 output interface of the MOSFET control module, the source electrode is connected with the positive electrode of capacitor C i The negative electrode of the negative electrode and the anode of diode D17 and the negative electrode of capacitor C9 are connected, the drain electrode is connected with the anode of diode D29 and the cathode of diode D17, the gate electrode of crystal switch tube T18 is connected with the T18 output interface of MOSFET control module, the source electrode is connected with the anode of diode D18 and the anode of diode D29, the drain electrode is connected with the cathode of diode D18 and the positive electrode of inductor L3, the cathode of diode D29 is connected with the positive electrode of capacitor C9 and the negative electrode of capacitor C10 and the anode of diode D30, the gate electrode of crystal switch tube T19 is connected with the T19 output interface of MOSFET control module, the source electrode is connected with the anode of diode D19 and the positive electrode of inductor L3, the drain electrode is connected with the cathode of diode D19 and the cathode of diode D30, the gate electrode of crystal switch tube T20 is connected with the T20 output interface of MOSFET control module, the source electrode is connected with the anode of diode D20 and the cathode of diode D30, the drain electrode is connected with the cathode of diode D20 and the positive electrode of capacitor Ci and the positive electrode of capacitor C10, the gate electrode of crystal switch tube T21 is connected with the T21 output interface of MOSFET control module, the source electrode is connected with the anode of diode D21 and the negative electrode of capacitor C11 and the negative electrode of capacitor Cc, the drain electrode is connected with the anode of diode D35 and the cathode of diode D21, the gate electrode of crystal switch tube T22 is connected with the T22 output interface of MOSFET control module, the source electrode is connected with the anode of diode D22 and the anode of diode D35, the drain electrode is connected with the cathode of diode D22 and the negative electrode of inductor L3, the cathode of diode D35 is connected with the positive electrode of capacitor C11 and the negative electrode of capacitor C12 and the anode of diode D36, the gate electrode of crystal switch tube T23 is connected with the T23 output interface of MOSFET control module, the source electrode is connected with the anode of diode D23 and the negative electrode of inductor L3, the drain electrode is connected with the cathode of diode D23 and the cathode of diode D36, the gate electrode of crystal switch tube T24 is connected with the T24 output interface of MOSFET control module, the source electrode is connected with the anode of diode D24 and the cathode of diode D36, the drain electrode is connected with the cathode of diode D24 and the positive electrode of capacitor C12 and the positive electrode of capacitor Cc, the positive electrode of capacitor C i The positive electrode is connected with voltage source V i The positive electrode is connected with voltage source V The negative electrode of capacitor Ci is connected with the negative electrode of capacitor Ca and the negative electrode of capacitor Cb and the negative electrode of capacitor Cc, the input port a of PMSM load module is connected with the positive electrode of capacitor Ca in Y-Inverter inverter module, the input port b of PMSM load module is connected with the positive electrode of capacitor Cb in Y-Inverter inverter module, and the input port c of PMSM load module is connected with the positive electrode of capacitor Cc in Y-Inverter inverter module.

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