CN101149197B - Frequency changing refrigeration system energy regeneration control device - Google Patents
Frequency changing refrigeration system energy regeneration control device Download PDFInfo
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- CN101149197B CN101149197B CN 200710113380 CN200710113380A CN101149197B CN 101149197 B CN101149197 B CN 101149197B CN 200710113380 CN200710113380 CN 200710113380 CN 200710113380 A CN200710113380 A CN 200710113380A CN 101149197 B CN101149197 B CN 101149197B
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Abstract
This invention discloses a frequency conversion refrigerating system energy regenerating control device. It includes power supply, compressor and inverter element. The inverter element is arranged with energy storage system, which controller controls the motor of compressor. When the controller monitors that the voltage of direct current bus bar connecting to the motor is higher than the direct current voltage corresponding to the input alternating current, the motor is under power generating state and charges up the energy storage system. When the controller monitors that the motor is under operation state, the energy storage system discharges and feeds the electric energy back to the direct current bus bar connecting to the motor. This invention increases the power factor of frequency conversion refrigerating system and saves energy.
Description
Technical field
The present invention relates to the energy conserving system of frequency-changeable compressor braking energy recycling.
Background technology
At present, the brake unit of domestic frequency-changeable compressor refrigeration system is generally all taked the dynamic braking mode, when the output frequency of frequency converter is close to zero; The rotating speed of motor is reduced to certain numerical value, and this moment, motor was in the dynamic braking state, and the kinetic energy of motor rotation converts the electric energy thermal losses in the power generation circuit of motor; For preventing that formed regenerative current is excessive in the motor deceleration process, cause the damage of frequency converter and motor, need seal in suitable brake unit or braking resistor; Energy has no to utilize like this, and to convert that heat-energy losses falls into be a kind of waste of energy, because the compressor refrigeration system installing space is narrow and small, installation difficulty is big on the other hand; Ventilation condition is poor; Heat is difficult in time distribute, and causes the compressor refrigeration system operating temperature to raise, and efficient reduces.
Summary of the invention
The present invention is directed to when motor is in the dynamic braking state in the prior art; The kinetic energy of its rotation converts heat energy loss causes energy dissipation in the power generation circuit of motor defective to; A kind of frequency changing refrigeration system energy regeneration control device is provided; This device can convert the kinetic energy of rotation to power storage and get off, and discharges electric energy when needed.
The technical solution that the present invention is directed to above-mentioned defective employing is:
Frequency changing refrigeration system energy regeneration control device comprises: power supply, compressor and inversion unit, energy-storage system is set on inversion unit, and the controller of energy-storage system is monitored the motor of compressor in real time:
(1) when monitoring control devices to pressing when being higher than the corresponding DC voltage of alternating voltage of input with the direct current bus bar that motor connects, motor is in generating state, and energy-storage system is charged;
(2) when monitoring control devices when motor is in running status, energy storage system discharges feeds back to electric energy the dc bus that is connected with motor.
Above-mentioned energy-storage system is provided with protected location, and the energy-storage system charging voltage reaches a certain limiting value, and this moment, motor still was in generating state, and protected location consumes unnecessary energy.
Above-mentioned energy-storage system also comprises charge circuit and discharge loop:
(1) charge circuit is made up of first switch module and energy-storage units; First switch module is connected with inversion unit with energy-storage units series connection back; When monitoring control devices to pressing when being higher than the corresponding DC voltage of alternating voltage of input with the direct current bus bar that motor connects, controller is through to the pulse conducting realization of first switch module charging process to energy-storage units;
(2) discharge loop is made up of second switch module and above-mentioned energy-storage units; The second switch module is parallelly connected with energy-storage units; When monitoring control devices when motor is in running status; Controller is through to the pulse conducting of second switch module, makes to form the positive right negative voltage in an instantaneous left side on the reactor in the energy-storage units, adds in the energy-storage units voltage on the electrochemical capacitor and just can realize the energy back from the electrochemical capacitor to the dc bus.
The reactor and the electrochemical capacitor of above-mentioned energy-storage units are connected in series.
Above-mentioned protected location is made up of the 3rd switch module and resistance series connection, and protected location is parallelly connected with electrochemical capacitor again, in the charging process; Voltage on electrochemical capacitor is increased to a certain limiting value; This moment, motor still was in generating state, and electric energy is constantly sent dc bus back to, and the voltage of dc bus continues to improve; Controller is controlled the conducting of the 3rd switch module, consumes unnecessary energy through protected location.
Switching device in above-mentioned first switch module, second switch module and the 3rd switch module adopts power transistor, metal-oxide-semiconductor field effect transistor, insulated gate bipolar transistor or gate turn off thyristor.
Beneficial effect of the present invention: this frequency changing refrigeration system energy regeneration control device, when compressor quit work, the electric energy that sends in its motor deceleration process was stored in the energy-storage units through charge circuit; Protected location plays a role when the energy-storage units charging voltage reaches a certain limiting value, and that part of energy of overtension is consumed through dynamic braking again, has both played the effect of dynamic braking, reaches the purpose of protection switch module and energy-storage units again; The energy-storage units energy stored discharges the acting of power supply motivation through discharge loop again when motor is in motor-operated running state.The charging and discharging that does not stop so just goes round and begins again, and the energy when not only making motor brake stores once more and utilizes, and has improved the power factor of frequency changing refrigeration system, thereby plays energy saving purposes.
Description of drawings
Fig. 1 forms sketch for frequency changing refrigeration system energy regeneration control device;
Fig. 2 is frequency changing refrigeration system energy regeneration control device control module circuit theory diagrams.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described:
The specific embodiment
In conjunction with Fig. 1, Fig. 2; Frequency changing refrigeration system energy regeneration control device; Comprise: power supply, rectification unit 1, buffer cell 2, filter unit 3, inversion unit 4 and compressor; On inversion unit 4, energy-storage system is set, energy-storage system comprises controller, charge circuit, discharge loop and protected location 7.
Rectification unit 1 adopts common uncontrollable rectifier bridge to carry out rectification; Filter unit 3 adopts general electrochemical capacitor E1, E2; Buffer cell 2 adopts controllable silicons, and inversion unit 4 is made up of power model, and the work of the charging of energy-storage system, discharge process and protected location 7 is controlled by controller.
Charge circuit is made up of with energy-storage units 6 first switch module 5, and first switch module 5 is connected with inversion unit 4 with energy-storage units 6 series connection backs.Discharge loop is made up of second switch module 8 and energy-storage units 6, and second switch module 8 is parallelly connected with energy-storage units 6, and energy-storage units 6 is connected in series by reactor L and electrochemical capacitor E3.Protected location 7 is made up of the 3rd switch module 9 and resistance R 2 series connection, and protected location 7 is parallelly connected with electrochemical capacitor E3 again.
Above-mentioned first switch module 5, second switch module 8, the 3rd switch module 9 constitute by the parallel connection of transistor AND gate fly-wheel diode, and transistor adopts power transistor, metal-oxide-semiconductor field effect transistor, insulated gate bipolar transistor or gate turn off thyristor.
When motor works in generating state; Controller is monitored the voltage of motor dc bus in real time; When monitoring control devices to pressing when being higher than the corresponding DC voltage of alternating voltage of input with the direct current bus bar that motor connects; Controller is controlled the 5 pulse conductings of first switch module and is turn-offed the charging process that second switch module 8 realizes energy-storage units 6, reactor L and the electrochemical capacitor E3 dividing potential drop of this moment, thus guarantee that electrochemical capacitor E3 is operated in the safe voltage.In the charging process, the voltage on electrochemical capacitor E3 is increased to a certain limiting value, and this moment, motor still was in generating state; Electric energy is constantly sent dc bus back to, and the voltage of dc bus continues to improve, and this moment, protected location 7 played a role; Controller is controlled the conducting of the 3rd switch module 9; That part of energy of overtension is consumed through resistance R 2 heatings, both played the effect of dynamic braking, reach the purpose of protection switch module and energy-storage units 6 again.
When motor works in motor-operated running state; Monitoring control devices finds that energy-storage system does not recharge; Then second switch module 8 is carried out the pulse conducting; Make on reactor L to form the positive right negative voltage in an instantaneous left side, add in the energy-storage units voltage on the electrochemical capacitor E3 and just can realize energy back from electrochemical capacitor E3 to dc bus.Controller is controlled the switching frequency and the dutycycle of second switch module 8 through the voltage monitoring to voltage on the electrochemical capacitor E3 and DC loop, thereby the control feedback current guarantees that too high situation does not appear in DC loop voltage.
Above-mentioned frequency changing refrigeration system energy regeneration control device is applicable to electric systems such as frequency conversion refrigerator, refrigerator, showcase, air-conditioning.
Claims (5)
1. frequency changing refrigeration system energy regeneration control device, comprising: power supply, compressor and inversion unit is characterized in that: energy-storage system is set on inversion unit, and the controller of energy-storage system is monitored the motor of compressor in real time:
(1) when monitoring control devices to pressing when being higher than the corresponding DC voltage of alternating voltage of input with the direct current bus bar that motor connects, motor is in generating state, and energy-storage system is charged;
(2) when monitoring control devices when motor is in running status, energy storage system discharges feeds back to electric energy the dc bus that is connected with motor.
2. frequency changing refrigeration system energy regeneration control device according to claim 1; It is characterized in that: said energy-storage system is provided with protected location; The energy-storage system charging voltage reaches a certain limiting value, and this moment, motor still was in generating state, and protected location consumes unnecessary energy.
3. frequency changing refrigeration system energy regeneration control device according to claim 2 is characterized in that: said energy-storage system also comprises charge circuit and discharge loop:
(1) charge circuit is made up of first switch module and energy-storage units; First switch module is connected with inversion unit with energy-storage units series connection back; When monitoring control devices to pressing when being higher than the corresponding DC voltage of alternating voltage of input with the direct current bus bar that motor connects, controller is through to the pulse conducting realization of first switch module charging process to energy-storage units;
(2) discharge loop is made up of second switch module and above-mentioned energy-storage units; The second switch module is parallelly connected with energy-storage units; When monitoring control devices when motor is in running status; Controller is through to the pulse conducting of second switch module, makes to form the positive right negative voltage in an instantaneous left side on the reactor in the energy-storage units, adds in the energy-storage units voltage on the electrochemical capacitor and just can realize the energy back from the electrochemical capacitor to the dc bus.
4. frequency changing refrigeration system energy regeneration control device according to claim 3 is characterized in that: the reactor and the electrochemical capacitor of said energy-storage units are connected in series.
5. frequency changing refrigeration system energy regeneration control device according to claim 3 is characterized in that: the switching device in said first switch module, second switch module and the 3rd switch module adopts power transistor, metal-oxide-semiconductor field effect transistor, insulated gate bipolar transistor or gate turn off thyristor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710113380 CN101149197B (en) | 2007-10-26 | 2007-10-26 | Frequency changing refrigeration system energy regeneration control device |
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| CN 200710113380 CN101149197B (en) | 2007-10-26 | 2007-10-26 | Frequency changing refrigeration system energy regeneration control device |
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| CN101149197A CN101149197A (en) | 2008-03-26 |
| CN101149197B true CN101149197B (en) | 2012-12-05 |
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| CN103538481B (en) * | 2012-07-12 | 2015-11-18 | 北汽福田汽车股份有限公司 | The control system of electronlmobil and brake protection device |
| DE102016223539A1 (en) * | 2016-11-28 | 2018-05-30 | Robert Bosch Gmbh | Protective device for an electric drive system, electric drive system and method for operating an electric drive system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311148A (en) * | 2000-02-28 | 2001-09-05 | 三菱电机株式会社 | Elevator control device |
| CN1425214A (en) * | 1999-11-17 | 2003-06-18 | 富士达株式会社 | Power supply for AC elevator |
| CN1930071A (en) * | 2004-03-18 | 2007-03-14 | 东芝电梯株式会社 | Elevator control device |
| CN201113564Y (en) * | 2007-10-26 | 2008-09-10 | 青岛澳柯玛股份有限公司 | Frequency conversion compressor energy regeneration control device |
-
2007
- 2007-10-26 CN CN 200710113380 patent/CN101149197B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425214A (en) * | 1999-11-17 | 2003-06-18 | 富士达株式会社 | Power supply for AC elevator |
| CN1311148A (en) * | 2000-02-28 | 2001-09-05 | 三菱电机株式会社 | Elevator control device |
| CN1930071A (en) * | 2004-03-18 | 2007-03-14 | 东芝电梯株式会社 | Elevator control device |
| CN201113564Y (en) * | 2007-10-26 | 2008-09-10 | 青岛澳柯玛股份有限公司 | Frequency conversion compressor energy regeneration control device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平4-236181A 1992.08.25 |
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Owner name: AUCMA CO., LTD. Free format text: FORMER NAME: QINGDAO AOKEMA CO., LTD. |
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Address after: 266510 No. 315, Bay Road, Qingdao economic and Technological Development Zone, Qingdao, Shandong Patentee after: Aucma Co., Ltd. Address before: 266510 No. 315, Bay Road, Qingdao economic and Technological Development Zone, Qingdao, Shandong Patentee before: Qingdao Aokema Co., Ltd. |