CN201821273U - Frequency converter with voltage and frequency adjusted separately - Google Patents
Frequency converter with voltage and frequency adjusted separately Download PDFInfo
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- CN201821273U CN201821273U CN2010205672248U CN201020567224U CN201821273U CN 201821273 U CN201821273 U CN 201821273U CN 2010205672248 U CN2010205672248 U CN 2010205672248U CN 201020567224 U CN201020567224 U CN 201020567224U CN 201821273 U CN201821273 U CN 201821273U
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- frequency converter
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Abstract
The utility model discloses a frequency converter with voltage and frequency adjusted separately, comprising a power supply unit, wherein the power supply unit comprises a rectifier, a filter and an inverter; an alternating current signal is converted to a direct current signal by the rectifier; and the direct current signal is filtered by the filter and then is converted to an alternating current signal with adjustable frequency by the inverter. The frequency converter is characterized by also comprising a control unit, wherein the control unit comprises a control board; the control board is connected with a control panel and/or a control I/O (input/output) unit; the control board is also connected with a motor control unit; the output end of the motor control unit is connected with a gate driver; and the motor control unit controls the frequency or voltage of the output signal of the inverter via the gate driver. According to the utility model, the voltage and frequency of the frequency converter are separately adjusted, and the requirement for driving different load motors in motor tests is met; and the frequency converter can also be applied to variable frequency power supplies, ensures fixed frequency and adjustable voltage and can be applied more widely.
Description
Technical field
The utility model relates to a kind of frequency converter, especially a kind of electric voltage frequency variable frequency convertor.
Background technology
Variable-frequency governor is called for short frequency converter, conversion by " AC-DC-AC " is rectified into direct current with the three-phase alternating current of input through rectification unit earlier, carry out filtering through filter capacitor, by inversion unit dc inverter is become the three-phase alternating current of frequency adjustable again, realize electric machine speed regulation.Its V/F curve of common frequency converter (being voltage/frequency curve) is constant, and voltage changes by predefined V/F curve, changes voltage in the time of frequency conversion, and promptly the ratio of V/F remains unchanged.Because its V/F curve is fixed, be mainly used in and drive fixing load motor, application scenario at motor test then can not meet the demands, motor test at be different motors, need the motor of test varied, the model of each motor, power, electric pressure, rated frequency, parameters such as speed all may be different, and testing of electric motors is except that needs are done no-load test, also need to do overspeed test, tests such as locked rotor test, therefore need a kind of frequency converter that can realize voltage and frequency separate regulation badly, to satisfy motor test, the demand of systems such as variable frequency power supply.But the frequency converter of voltage and frequency separate regulation makes Inverter Application more extensive.
The utility model content
The technical problems to be solved in the utility model provides a kind of frequency converter that can realize voltage and frequency separate regulation, to satisfy motor test, the demand of systems such as variable frequency power supply.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopted is:
But the frequency converter of voltage and frequency separate regulation, comprise power subsystem, described power subsystem comprises rectifier, filter and inverter, AC signal becomes direct current signal by rectifier, direct current signal is through filter filtering, by inverter direct current signal is become the AC signal of frequency adjustable again, but the frequency converter of this voltage and frequency separate regulation also comprises a control unit, described control unit comprises control board, control board is connected with control panel and/or control I/O unit, control board also is connected with motor control unit, the output of motor control unit is connected with gate driver, and motor control unit is by gate driver control inverter output signal frequency or voltage.
Further, described rectifier output end also is connected with Switching Power Supply, and Switching Power Supply is connected with fan.
Further, described Switching Power Supply is the inside DC power supply of controller.
Further, described rectifier output end also is connected with the braking chopper.
Further, described inverter output end is connected with current sensor, and the output of described current sensor is connected with test module, and the output of test module links to each other with control board.
Further, described control I/O unit is connected with communication unit and host computer in turn.
Further, described control panel includes LCD MODULE and button control module.
Further, described control I/O unit is connected with and can carries out the frequency converter state and show output relay.
The beneficial effects of the utility model are: the utility model has been realized frequency converter voltage and frequency separate regulation, satisfied the requirement that drives different load motors in the motor test, can regulate the voltage and the frequency of needs output according to the different parameters of electric machine, voltage and frequency can be in operation and regulate arbitrarily, and do in test the motor rotation blockage test; The utility model also can be applicable to variable frequency power supply, realizes fixed-frequency, and voltage is adjustable.The utility model makes Inverter Application more extensive.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
But Fig. 1 is the frequency converter hardware block diagram of voltage and frequency separate regulation.
Embodiment
But the frequency converter of voltage and frequency separate regulation, comprise power subsystem, described power subsystem comprises rectifier 1, filter 2 and inverter 3, AC signal becomes direct current signal by rectifier 1, direct current signal is through filter 2 filtering, by inverter 3 direct current signal is become the AC signal of frequency adjustable again, but the frequency converter of this voltage and frequency separate regulation also comprises a control unit, described control unit comprises control board 4, control board 4 is connected with control panel 5 and/or control I/O unit 6, control board 4 also is connected with motor control unit 7, the output of motor control unit 7 is connected with gate driver 8, and motor control unit 7 is by gate driver 8 control inverters, 3 output signal frequency or voltage.
Further, described rectifier 1 output also is connected with Switching Power Supply 12, and Switching Power Supply is connected with fan 13.
Further, described Switching Power Supply 12 is the inside DC power supply of controller, can the drive controlling plate, control panel etc.
Further, described rectifier 1 output also is connected with braking chopper 11.The braking chopper contains brake resistance, can be when motor rotation blockage be tested with ability consumption on brake resistance.
Further, described inverter output end is connected with current sensor 9, and the output of described current sensor 9 is connected with test module 10, and the output of test module 10 links to each other with control board 4, and control board 4 can be monitored output current signal.
Further, described control I/O unit 6 is connected with communication unit and host computer in turn.Host computer can be communicated by letter with control I/O unit 6 by communication unit, regulates the output voltage or the frequency of frequency converter by external command.Communication unit adopts the communication protocol of FROFIBUS, also can change other communication protocols into as required.
Further, described control panel 5 includes LCD MODULE and button control module.
Further, described control I/O unit 6 is connected with and can carries out the frequency converter state and show output relay, can indicate states such as frequency converter moves, is ready to, fault.
But voltage and frequency separate regulation frequency converter have manually/bus communication control dual mode.During manual mode, the reference value of voltage and frequency is directly given by the potentiometer that links to each other with the I/O control unit, changes voltage or the given size of frequency by regulator potentiometer; During the bus communication control mode, the set-point of control command and frequency, voltage is given by communication mode by host computer.
More than be that preferable enforcement of the present invention is specified, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite of spirit of the present invention, distortion that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (9)
1. but the frequency converter of voltage and frequency separate regulation, comprise power subsystem, described power subsystem comprises rectifier (1), filter (2) and inverter (3), AC signal becomes direct current signal by rectifier (1), direct current signal is through filter (2) filtering, by inverter (3) direct current signal is become the AC signal of frequency adjustable again, it is characterized in that: also comprise a control unit, described control unit comprises control board (4), control board (4) is connected with control panel (5) and/or control I/O unit (6), control board (4) also is connected with motor control unit (7), the output of motor control unit (7) is connected with gate driver (8), and motor control unit (7) is by gate driver (8) control inverter (3) output signal frequency or voltage.
2. but the frequency converter of voltage according to claim 1 and frequency separate regulation is characterized in that: described rectifier (1) output also is connected with Switching Power Supply (12).
3. but the frequency converter of voltage according to claim 2 and frequency separate regulation is characterized in that: described Switching Power Supply is connected with fan (13).
4. but the frequency converter of voltage according to claim 2 and frequency separate regulation is characterized in that: described Switching Power Supply (12) is the inside DC power supply of controller.
5. but the frequency converter of voltage according to claim 1 and frequency separate regulation is characterized in that: described rectifier (1) output also is connected with braking chopper (11).
6. but the frequency converter of voltage according to claim 1 and frequency separate regulation, it is characterized in that: described inverter output end is connected with current sensor (9), the output of described current sensor (9) is connected with test module (10), and the output of test module (10) links to each other with control board (4).
7. but the frequency converter of voltage according to claim 1 and frequency separate regulation is characterized in that: described control I/O unit (6) is connected with communication unit and host computer in turn.
8. but the frequency converter of voltage according to claim 1 and frequency separate regulation is characterized in that: described control panel includes LCD MODULE and button control module.
9. but according to the frequency converter of each described voltage of claim 1 to 8 and frequency separate regulation, it is characterized in that: described control I/O unit (6) is connected with and can carries out frequency converter state demonstration output relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205672248U CN201821273U (en) | 2010-10-19 | 2010-10-19 | Frequency converter with voltage and frequency adjusted separately |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205672248U CN201821273U (en) | 2010-10-19 | 2010-10-19 | Frequency converter with voltage and frequency adjusted separately |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201821273U true CN201821273U (en) | 2011-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205672248U Expired - Lifetime CN201821273U (en) | 2010-10-19 | 2010-10-19 | Frequency converter with voltage and frequency adjusted separately |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201821273U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633305A (en) * | 2018-12-12 | 2019-04-16 | 盐田国际集装箱码头有限公司 | A kind of frequency converter failure processing method and frequency converter failure processing platform |
| CN109855237A (en) * | 2018-12-13 | 2019-06-07 | 湖南普信工程技术有限公司 | A kind of energy-saving control system of air-conditioning |
| CN110601747A (en) * | 2019-10-09 | 2019-12-20 | 华讯方舟科技（湖北）有限公司 | Microwave frequency converter control circuit, microwave frequency converter and communication system |
-
2010
- 2010-10-19 CN CN2010205672248U patent/CN201821273U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633305A (en) * | 2018-12-12 | 2019-04-16 | 盐田国际集装箱码头有限公司 | A kind of frequency converter failure processing method and frequency converter failure processing platform |
| CN109855237A (en) * | 2018-12-13 | 2019-06-07 | 湖南普信工程技术有限公司 | A kind of energy-saving control system of air-conditioning |
| CN110601747A (en) * | 2019-10-09 | 2019-12-20 | 华讯方舟科技（湖北）有限公司 | Microwave frequency converter control circuit, microwave frequency converter and communication system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110504 |