CN210346957U - Electric dynamometer machine control system with energy feedback function - Google Patents
Electric dynamometer machine control system with energy feedback function Download PDFInfo
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- CN210346957U CN210346957U CN201921464626.2U CN201921464626U CN210346957U CN 210346957 U CN210346957 U CN 210346957U CN 201921464626 U CN201921464626 U CN 201921464626U CN 210346957 U CN210346957 U CN 210346957U
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Abstract
The utility model provides a take electric dynamometer machine control system of energy feedback function, it includes the controller, respectively with rectification repayment unit and converter that the controller is connected, and with the electric dynamometer machine that the converter is connected, wherein: the rectification feedback device comprises an IGBT power unit and a DSP processing unit, wherein the IGBT power unit is configured to realize rectification based on an IGBT rectifier bridge and realize bidirectional flow of energy, and the DSP processing unit is configured to generate PWM control pulses; the frequency converter is configured to generate a driving signal required by the electric dynamometer based on the SVPWM control pulse. The utility model provides an electric dynamometer machine control system has following technological effect: 1. the bidirectional flow of energy is realized, and the energy fed back by the motor is sent back to the power grid, so that a large amount of energy is saved; 2. and the harmonic pollution to the power grid is reduced.
Description
Technical Field
The utility model belongs to the technical field of the engine test and specifically relates to a take electric power dynamometer machine control system of energy feedback function is related to.
Background
Most of common frequency converters convert alternating current into direct current by adopting a diode rectifier bridge, and then convert the direct current into PWM alternating current with adjustable voltage and frequency by adopting an IGBT (insulated gate bipolar transistor) inversion technology. The frequency converter can only work in an electric state, so the frequency converter is called a two-quadrant frequency converter. Because the two-quadrant frequency converter adopts the diode rectifier bridge, the bidirectional flow of energy can not be realized, and the energy of a motor feedback system can not be sent back to a power grid.
In the application place of the electric dynamometer, the motor is in a power generation state, so that the motor can generate a large amount of regenerated electric energy and directly act on the intermediate direct-current part of the frequency converter, and the frequency converter can be failed or damaged if the electric energy is not consumed. The existing method is to add a brake resistor on a frequency converter to consume the energy fed back by a motor. In addition, diode rectifier bridges produce severe harmonic pollution to the grid.
In summary, the problems of the control system of the electric dynamometer in the prior art are as follows: 1. the bidirectional flow of energy cannot be realized, and the energy of a motor feedback system cannot be sent back to a power grid, so that a large amount of energy is wasted. 2. Diode rectifier bridges in frequency converters can cause serious harmonic pollution to the power grid.
SUMMERY OF THE UTILITY MODEL
The utility model provides a take electric power dynamometer machine control system of energy feedback function, its detailed technical scheme as follows:
the utility model provides a take electric dynamometer control system of energy feedback function, its includes the controller, respectively with rectification feedback unit and the converter that the controller is connected, and with the electric dynamometer machine that the converter is connected, wherein:
the rectification feedback device comprises an IGBT power unit and a DSP processing unit, wherein the IGBT power unit is configured to realize rectification based on an IGBT rectifier bridge and realize bidirectional flow of energy, and the DSP processing unit is configured to generate PWM control pulses;
the frequency converter is configured to generate a driving signal required by the electric dynamometer based on the SVPWM control pulse.
Further, the electric dynamometer comprises an electric dynamometer cooling fan connected with the controller and close to the electric dynamometer.
Further, a rotation speed sensor and a torque sensor are connected to the electric dynamometer, wherein: the rotating speed sensor is connected with the frequency converter, and the torque sensor is connected with the controller; the rotating speed sensor is configured to acquire the rotating speed of the electric dynamometer and transmit an acquired rotating speed signal to the frequency converter; the torque sensor is configured to collect torque of the electric dynamometer and transmit a collected torque signal to the controller.
Furthermore, the device also comprises an upper computer connected with the controller.
Compared with the prior art, the utility model provides an electric dynamometer machine control system has following technological effect: 1. the bidirectional flow of energy is realized, and the energy fed back by the motor is sent back to the power grid, so that a large amount of energy is saved; 2. and the harmonic pollution to the power grid is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings which are needed in the embodiments and are practical will be briefly described below and will be obvious, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. Wherein the content of the first and second substances,
fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, an electric dynamometer control system with energy feedback function provided by the embodiment of the present invention includes a controller 1, a rectification feedback unit 2 and a frequency converter 3 respectively connected to the controller 1, and an electric dynamometer 4 connected to the frequency converter 3. Wherein:
the rectification feedback device 2 comprises an IGBT power unit 21 and a DSP processing unit 22, the IGBT power unit 21 adopts an IGBT as a rectifier bridge to realize bidirectional flow of energy, and the DSP processing unit 22 generates SVPWM control pulses through high-speed operation.
The IGBT is used as a rectifier bridge, on one hand, alternating current can be converted into direct current to achieve rectification of the alternating current, and on the other hand, electric energy fed back by the motor can be fed back to a power grid, so that an energy-saving effect is achieved. In addition, the IGBT is adopted as the rectifier bridge, so that harmonic pollution to the power grid is reduced.
The rectification feedback device 2 can adopt a known rectification feedback device with an IGBT rectification function and a DSP processing function.
The frequency converter 3 is configured to generate a drive signal required for the electric dynamometer 4 based on the SVPWM control pulse. The rectification feedback device 2 is connected with the frequency converter 3 through a direct current bus bar, and after the rectification feedback device 2 is started, the controller 1 issues a start/stop command to the frequency converter 3. The frequency converter 3 receives the starting signal from the controller 1 and drives the electric dynamometer 4 to work.
In some embodiments, the utility model adopts a frequency converter of ABB company, model number ASC880 as the frequency converter 3, which is based on DTC direct rotor control technology and can precisely control the stator flux and torque of the motor, thereby well meeting the loading requirement of the electric dynamometer,
optionally, the utility model discloses still include the electric dynamometer machine cooling fan 5 that is connected with controller 1 and is close to electric dynamometer machine 4, in the 4 working processes of electric dynamometer machine, the steerable electric dynamometer machine cooling fan 5 of controller 1 starts to the realization is to the heat dissipation of electric dynamometer machine 4.
With continuing reference to fig. 1, optionally, a rotation speed sensor 41 and a torque sensor 42 are connected to the electric dynamometer 4, wherein: the rotational speed sensor 41 is connected to the inverter 3, and the torque sensor 42 is connected to the motor 1. The rotation speed sensor 41 is used for collecting a rotation speed signal of the electric dynamometer 4 and feeding the rotation speed signal back to the frequency converter 3, and the torque sensor 42 is used for collecting a torque signal of the electric dynamometer 4 and feeding the torque signal back to the controller 1. In the rotation speed control mode, the frequency converter 3 receives the rotation speed signal fed back from the rotation speed sensor 41, and corrects the driving signal thereof based on the rotation speed signal, so as to improve the control accuracy. In the torque control mode, the frequency converter 3 receives a torque signal sent by the controller and corrects a driving signal of the torque signal so as to improve the control precision.
Preferably, in some embodiments, the present invention further comprises an upper computer 6 connected to the controller 1.
The invention has been described above with a certain degree of particularity and detail. It will be understood by those of ordinary skill in the art that the description of the embodiments is merely exemplary and that all changes that may be made without departing from the true spirit and scope of the present invention are intended to be within the scope of the present invention. The scope of the invention is defined by the appended claims rather than by the foregoing description of the embodiments.
Claims (4)
1. The utility model provides a take electric dynamometer machine control system of energy feedback function which characterized in that, it includes the controller, respectively with rectification feedback unit and the converter that the controller is connected, and with the electric dynamometer machine that the converter is connected, wherein:
the rectification feedback device comprises an IGBT power unit and a DSP processing unit, wherein the IGBT power unit is configured to realize rectification based on an IGBT rectifier bridge and realize bidirectional flow of energy, and the DSP processing unit is configured to generate SVPWM control pulses;
the frequency converter is configured to generate a driving signal required by the electric dynamometer based on the SVPWM control pulse.
2. The electric dynamometer control system of claim 1, wherein: the electric dynamometer further includes an electric dynamometer cooling fan connected to the controller and located proximate to the electric dynamometer.
3. The electric dynamometer control system of claim 1, wherein: be connected with speed sensor and torque sensor on the electric dynamometer machine, wherein: the rotating speed sensor is connected with the frequency converter, and the torque sensor is connected with the controller;
the rotating speed sensor is configured to acquire the rotating speed of the electric dynamometer and transmit an acquired rotating speed signal to the frequency converter;
the torque sensor is configured to collect torque of the electric dynamometer and transmit a collected torque signal to the controller.
4. The electric dynamometer control system of claim 1, wherein: the device also comprises an upper computer connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921464626.2U CN210346957U (en) | 2019-09-04 | 2019-09-04 | Electric dynamometer machine control system with energy feedback function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921464626.2U CN210346957U (en) | 2019-09-04 | 2019-09-04 | Electric dynamometer machine control system with energy feedback function |
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| CN210346957U true CN210346957U (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921464626.2U Active CN210346957U (en) | 2019-09-04 | 2019-09-04 | Electric dynamometer machine control system with energy feedback function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323378A (en) * | 2021-12-30 | 2022-04-12 | 中国科学院工程热物理研究所 | Electric power measuring system and method |
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2019
- 2019-09-04 CN CN201921464626.2U patent/CN210346957U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323378A (en) * | 2021-12-30 | 2022-04-12 | 中国科学院工程热物理研究所 | Electric power measuring system and method |
| CN114323378B (en) * | 2021-12-30 | 2024-01-23 | 中国科学院工程热物理研究所 | Electric power dynamometer system and electric power dynamometer method |
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