CN211627761U - High-speed permanent magnet synchronous motor loading device - Google Patents
High-speed permanent magnet synchronous motor loading device Download PDFInfo
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- CN211627761U CN211627761U CN201920999563.4U CN201920999563U CN211627761U CN 211627761 U CN211627761 U CN 211627761U CN 201920999563 U CN201920999563 U CN 201920999563U CN 211627761 U CN211627761 U CN 211627761U
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Abstract
The utility model discloses a high-speed PMSM loading device, including rectifier module, the transform module that steps up, the contravariant module, the filter cabinet, the chopper module, the control box, load resistance, the rectifier module input links to each other with high-speed PMSM, the rectifier module output with the input of the transform module that steps up, the input of chopper module links to each other, the output of chopper module links to each other with load resistance, the output of the transform module that steps up, the contravariant module, the filter cabinet, alternating current electric network links to each other in proper order, the control box respectively with the chopper module, the transform module that steps up, the contravariant module links to each other. The utility model discloses a chopper module with the contravariant module that steps up, with resistance chopping loading with step up contravariant repayment loading and combine together, loading demand when can satisfying the low output voltage working section of high-speed motor low rotational speed can satisfy the loading demand when the high-frequency working section in the high-speed motor well rotational speed again, two kinds of state automatic switch-over realize the accurate control of steady transition and power.
Description
Technical Field
The utility model belongs to the technical field of the relevant equipment technique of high-speed electric machine and specifically relates to a high-speed PMSM loading device.
Background
With the development of the technology, high-speed motors (the rotating speed is not lower than 10000rmp) are more and more widely applied to the industries of aerospace, ships, new energy automobiles, robots, air compressors, refrigeration, sewage treatment, waste heat recovery and the like. In order to obtain the design performance of a high-speed motor, it is important how to perform a load test on a high-speed permanent magnet synchronous motor (including a generator and a motor). Common motor loading methods are mainly classified into a resistance energy consumption type, a four-quadrant feedback type, a voltage transformation feedback type and a voltage boosting feedback type. The resistance energy consumption type consumes the electricity generated by the motor in a resistance mode, and has the main defects that the electric energy is consumed by the resistance in a heating mode, energy is not saved, the environment is not protected, and especially when a high-power unit is used for a long-time life experiment, the electricity consumption cost generated by the energy consumption is not small and great. The four-quadrant feedback type is to feed back the electric energy generated by the motor to the alternating current power grid through the frequency converter and the inverter, wherein the frequency converter can realize the torque control of the motor, the control performance is superior, but the output frequency of the high-speed motor is often as high as kilohertz, which provides a very strict requirement for the control performance of the frequency converter. The transformation feedback type is to feed back the electric energy to the alternating current power grid through an inverter and a step-up transformer, but the range of the output voltage of the motor which can be adapted by the scheme is limited. The boost feedback type is to feed back electric energy to an alternating current power grid through boost conversion and inversion feedback, and the scheme cannot completely cover the whole operating frequency range of the motor due to the limited voltage transformation ratio of the boost conversion, and is particularly abnormal and passive in a low-speed and low-voltage power generation state.
Therefore, need for a device, require that its scheme is ripe, reliable and stable, technical risk is low, facilitate promotion is used, can satisfy high-speed motor's full frequency output scope, can satisfy high-speed motor's full voltage output scope again, realize the loading control to high-speed motor, and the loading mode is energy-concerving and environment-protective simultaneously, and the volume and the cost of equipment are all in reasonable acceptance range.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a high-speed PMSM loading device, simple structure, function are comprehensive.
The technical scheme of the utility model is that: the utility model provides a high-speed PMSM loading device, includes high-speed motor, rectifier module, chopper module, control box, load resistance, the transform module that steps up, contravariant module, filtering cabinet, AC network, high-speed PMSM output links to each other with rectifier module input, rectifier module output links to each other with chopper module input, the transform module input that steps up respectively, wherein chopper module output links to each other with load resistance input, wherein the transform module output that steps up links to each other with contravariant module input, contravariant module output links to each other with filtering cabinet input, filtering cabinet output links to each other with AC network, the input-output terminal of control box respectively with chopper module, the transform module that steps up, the input-output terminal of contravariant module link to each other.
Preferably, the rectifier module adopts a three-phase rectifier bridge composed of first to sixth diodes, and the three-phase rectifier bridge has a positive output end and a negative output end.
Preferably, the chopper module includes a first capacitor, a seventh diode, and a first IGBT, wherein one end of the first capacitor and a drain of the first IGBT are connected together to serve as an input end of the chopper module and to be connected to a positive output end of the three-phase rectifier bridge, a source of the first IGBT serves as an output end of the chopper module and is connected to a negative electrode of the seventh diode and one end of the load resistor, a positive electrode of the seventh diode, the other end of the load resistor, the other end of the first capacitor, and a negative output end of the three-phase rectifier bridge, and a gate of the first IGBT is connected to the control box.
Preferably, the boost conversion module includes a second capacitor, an eighth diode, a first inductor, and a second IGBT, wherein one end of the second capacitor and one end of the first inductor are connected together as an input end of the boost conversion module and connected to a positive output end of the three-phase rectifier bridge, the other end of the second capacitor and a source electrode of the second IGBT are connected to a negative output end of the three-phase rectifier bridge, a drain electrode of the second IGBT is connected to the other end of the first inductor and an anode of the eighth diode, a cathode of the eighth diode is used as an output end of the boost conversion module, and a gate of the second IGBT is connected to the control box.
Preferably, the intelligent control system further comprises a human-computer interaction interface, and the human-computer interaction interface is connected with the control box.
Preferably, the control box adopts a general control chip DSP.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model provides a high-speed PMSM loading device, including chopper module and boost contravariant module, combine resistance chopper loading with boost contravariant repayment loading, under the restriction of a series of factors such as fully considering equipment volume, cost, technical feasibility, energy-concerving and environment-protective, facilitate promotion, can satisfy the loading demand when the low rotational speed of high-speed motor is low output voltage working section, can satisfy the loading demand when the high-speed motor is high-frequency working section in the high-speed rotational speed again, two kinds of state automatic switch-over, realize smooth transition and accurate control of power; the chopping module can also serve as a discharge loop, so that high voltage is prevented from being generated to damage equipment during motor runaway, and the reliability of the device is improved.
Drawings
Fig. 1 is a block diagram of the present invention.
Fig. 2 is an overall circuit diagram of the present invention.
Fig. 3 is a circuit diagram of the rectifier module of fig. 1.
Fig. 4 is a circuit diagram of the chopper module of fig. 1.
Fig. 5 is a circuit diagram of the boost converter module of fig. 1.
Fig. 6 is a circuit diagram of the inverter module in fig. 1.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
As shown in fig. 1 and 2, a high-speed permanent magnet synchronous motor loading device includes a high-speed permanent magnet synchronous motor M, a rectification module 1, a chopper module 2, a control box, a load resistor 3, a boost conversion module 4, an inverter module 5, a filter cabinet 6, and an ac network. The output end of the high-speed permanent magnet synchronous motor M is connected with the input end of the rectifier module 1, the output end of the rectifier module 1 is respectively connected with the input end of the chopper module 2, the input end of the boost conversion module 4 is connected with the input end of the load resistor 3, the output end of the boost conversion module 4 is connected with the input end of the inversion module 5, the output end of the inversion module 5 is connected with the input end of the filter cabinet 6, the output end of the filter cabinet 6 is connected with an alternating current power grid, and the input and output end of the control box is respectively connected with the input and output ends of the chopper module 2, the boost. The control box adopts a general control chip DSP.
As shown in fig. 3, the rectifier module 1 employs a three-phase rectifier bridge composed of first to sixth diodes VT11-VT16, and the three-phase rectifier bridge has a positive output terminal and a negative output terminal, which sufficiently meets the special working condition of high-frequency input.
As shown in fig. 4, the chopper module 2 includes a first capacitor C21, a seventh diode VD21, and a first IGBT VT21, wherein one end of the first capacitor C21 and a drain of the first IGBT VT21 are connected together as an input terminal of the chopper module 2 and connected to a positive output terminal of the three-phase rectifier bridge, a source of the first IGBT VT21 is used as an output terminal of the chopper module 2 and connected to a negative terminal of the seventh diode VD21 and one end of the load resistor 3, an anode of the seventh diode VD21, the other end of the load resistor 3, the other end of the first capacitor C21 and connected to a negative output terminal of the three-phase rectifier bridge, and a gate of the first IGBT VT21 is connected to the control box.
When the high-speed motor is in a low-speed low-output voltage working section, the loading is realized in a resistance consumption mode due to the fact that the output voltage is low; when the motor coaster produces high pressure, the chopper module also can act as the bleeder circuit, consumes unnecessary energy instantaneously, and the protection equipment is safe.
As shown in fig. 5, the boost converter module 4 includes a second capacitor C31, an eighth diode VD31, a first inductor L31, and a second IGBT VT31, wherein one end of the second capacitor C31 and one end of the first inductor L31 are connected together to serve as an input end of the boost converter module 4 and connected to a positive output end of the three-phase rectifier bridge, the other end of the second capacitor C31 and a source of the second IGBT VT31 are connected to a negative output end of the three-phase rectifier bridge, a drain of the second IGBT VT31 is connected to the other end of the first inductor L31 and a positive electrode of the eighth diode VD31, a negative electrode of the eighth diode VD31 serves as an output end of the boost converter module 4, and a gate of the second IGBT VT31 is connected to the control box.
The Boost conversion module 4 is used as a Boost circuit, and works when the high-speed motor is in a medium-high frequency working section, and the Boost conversion module 4 is subjected to direct current control, so that the power control of Boost inversion feedback loading can be realized.
As shown in fig. 6, the inverter module 5 implements constant voltage control in the boost inverter feedback loading mode, and fully maintains the stability of the dc bus voltage in the loop.
The chopping module 2, the boost conversion module 4 and the inversion module 5 are in a segmented working mode, and when the motor works in a low-rotating-speed low-voltage state, the chopping module 2 is put into operation; when the motor works in a medium-high speed and high-frequency state, the boosting conversion module 4 and the inversion module 5 are put into operation, and the two states are automatically switched to realize stable transition.
The utility model discloses a theory of operation does: the control box judges the working state of the motor according to the detected feedback signal (which can be obtained from the chopping module or the boosting and transforming module), when the fact that the direct-current voltage of the output end of the rectifying module 1 is low is detected, the control box sends a working signal instruction to the chopping module 2, the chopping module 2 finishes the absorption of the corresponding output power of the motor according to the instruction, and meanwhile, the inverter module 5 is started to prepare for the speed increase of the motor; when the rotating speed of the motor is increased, the output frequency is increased, and the corresponding output voltage is increased, the control box sends a working instruction to the boost conversion module 4, and the loading mode is switched from the chopping loading of the resistor to the boosting inversion feedback loading; when the rotating speed is reduced and the output voltage falls back, the loading mode is switched from boosting inversion feedback loading to resistance chopping loading, so that in order to avoid frequent switching under two loading modes, overlapping processing is carried out in a switching interval, and in order to avoid power jump during switching, linear processing is carried out in the switching process; when the direct-current voltage is detected to be higher than the normal working range, the control box considers that the motor is in an runaway state, and the chopping module 2 can be immediately started at the moment to assist the system to instantaneously consume redundant energy and protect the safety of equipment. The HMI carries out data interaction with the control box to realize the functions of data transmission, display and recording.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the right of the present invention should not be limited thereby, and therefore, modifications, equivalent changes, improvements, etc. made in the claims of the present invention are still included in the scope of the present invention.
Claims (6)
1. The utility model provides a high-speed PMSM loading device which characterized in that: the high-speed permanent magnet synchronous motor comprises a high-speed motor, a rectifying module, a chopping module, a control box, a load resistor, a boosting conversion module, an inversion module, a filter cabinet and an alternating current network, wherein the output end of the high-speed permanent magnet synchronous motor is connected with the input end of the rectifying module, the output end of the rectifying module is respectively connected with the input end of the chopping module and the input end of the boosting conversion module, the output end of the chopping module is connected with the input end of the inversion module, the output end of the inversion module is connected with the input end of the filter cabinet, the output end of the filter cabinet is connected with the alternating current network, and the input end and the output end of the control box are respectively connected with the input end and the output.
2. The high-speed permanent magnet synchronous motor loading device according to claim 1, characterized in that: the rectifier module adopts a three-phase rectifier bridge composed of first to sixth diodes, and the three-phase rectifier bridge is provided with a positive output end and a negative output end.
3. The high-speed permanent magnet synchronous motor loading device according to claim 1, characterized in that: the chopper module comprises a first capacitor, a seventh diode and a first IGBT (insulated gate bipolar transistor), wherein one end of the first capacitor and the drain electrode of the first IGBT are connected together to serve as the input end of the chopper module and connected with the positive output end of the three-phase rectifier bridge, the source electrode of the first IGBT serves as the output end of the chopper module and is connected with the negative electrode of the seventh diode and one end of the load resistor, the positive electrode of the seventh diode, the other end of the load resistor, the other end of the first capacitor and the negative output end of the three-phase rectifier bridge are connected, and the grid electrode of the first IGBT is connected with the control box.
4. The high-speed permanent magnet synchronous motor loading device according to claim 1, characterized in that: the boost conversion module comprises a second capacitor, an eighth diode, a first inductor and a second IGBT (insulated gate bipolar transistor), wherein one end of the second capacitor and one end of the first inductor are connected together to serve as the input end of the boost conversion module and connected to the positive output end of the three-phase rectifier bridge, the other end of the second capacitor and the source electrode of the second IGBT are connected with the negative output end of the three-phase rectifier bridge, the drain electrode of the second IGBT is connected with the other end of the first inductor and the positive electrode of the eighth diode, the negative electrode of the eighth diode serves as the output end of the boost conversion module, and the grid electrode of the second IGBT is connected with the control box.
5. The high-speed permanent magnet synchronous motor loading device according to claim 1, characterized in that: the system also comprises a human-computer interaction interface, and the human-computer interaction interface is connected with the control box.
6. The high-speed permanent magnet synchronous motor loading device according to any one of claims 1-5, characterized in that: the control box adopts a general control chip DSP.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920999563.4U CN211627761U (en) | 2019-06-30 | 2019-06-30 | High-speed permanent magnet synchronous motor loading device |
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| CN201920999563.4U CN211627761U (en) | 2019-06-30 | 2019-06-30 | High-speed permanent magnet synchronous motor loading device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116990601A (en) * | 2023-06-28 | 2023-11-03 | 荣信汇科电气股份有限公司 | High-power chopper circuit DC load capacity test device and test method |
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2019
- 2019-06-30 CN CN201920999563.4U patent/CN211627761U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116990601A (en) * | 2023-06-28 | 2023-11-03 | 荣信汇科电气股份有限公司 | High-power chopper circuit DC load capacity test device and test method |
| CN116990601B (en) * | 2023-06-28 | 2024-04-02 | 荣信汇科电气股份有限公司 | High-power chopper circuit DC load capacity test device and test method |
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