CN103166190A - Alternating current variable-pitch motor protection device and method - Google Patents
Alternating current variable-pitch motor protection device and method Download PDFInfo
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- CN103166190A CN103166190A CN2011104271278A CN201110427127A CN103166190A CN 103166190 A CN103166190 A CN 103166190A CN 2011104271278 A CN2011104271278 A CN 2011104271278A CN 201110427127 A CN201110427127 A CN 201110427127A CN 103166190 A CN103166190 A CN 103166190A
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- maximum overload
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Abstract
The invention discloses an alternating current variable-pitch motor protection method. The alternating current variable-pitch motor protection method comprises the following steps: a setting step, an accumulation step and a protection step. According to the setting step, when current loop preset in a current loop control circuit is changed, the maximum overload multiple and the maximum overload time are set. According to the accumulation step, when current begins to rise, accumulated values of an accumulator begin to be timed and accumulated, and when the current begins to fall, the accumulated values begin to be reduced until zero. According to the protection step, after preset current reaches the maximum overload multiple of rated current and the accumulated values reach the maximum overload time, the preset current is reduced to the rated current by the current loop control circuit. According to the alternating current variable-pitch motor protection method, the situation that an alternating current variable-pitch motor is burned down because of constant output of large current under long-time heavy-load conditions can be reduced effectively, and production efficiency and safety performance are improved.
Description
Technical field
The present invention relates to wind power generation field, relate in particular to a kind of protective device and method that becomes the oar motor that exchange.
Background technology
at present, in wind field pitch-controlled system used, the direct current pitch-controlled system has occupied the very big market, the change oar motor that uses is take series DC machine as main, direct current becomes the oar motor owing to passing through back-up source directly to the motor oar of powering back, thereby increased the reliability of system, but direct current becomes the oar motor generally to be applied in the small wind pitch-controlled system more, powerful direct current becomes the oar motor because volume is large, Heavy Weight, be not easy to install, and with commutator and brush, brought the maintenance issues of follow-up commutator and brush, thereby in medium-and-large-sized wind power pitch-controlled system all to exchange pitch-controlled system as main, change oar motor used is mainly asynchronous machine or permagnetic synchronous motor.
For the software feature of series DC machine, the characteristic of alternating current machine is harder, when externally load torque increases, rotation speed change is little, and electric current meeting fast rise, if electric current continue to keep higher value output, when namely external loading was always large, motor worked long hours and must burn under this state.
Summary of the invention
In view of the defective that above-mentioned prior art exists, the objective of the invention is to propose a kind of protective device and method that becomes the oar motor that exchange, prevent that alternating current machine from long-time high electric current occurring, burning during high load capacity.
Purpose of the present invention will be achieved by the following technical programs:
A kind of interchange becomes the oar electric motor protective device, comprises exchanging the driver that becomes the oar motor, and described driver comprises controls the given current loop control circuit of electric current loop, also comprises an accumulator, and described accumulator is connected with described current loop control circuit.
A kind of interchange becomes the oar motor protection method, comprises the following steps:
Step S1: setting steps, change electric current loop given in described current loop control circuit, maximum overload multiple and maximum overload time are set;
Step S2: accumulation step, when electric current began to rise, it is cumulative that the accumulated value of described accumulator begins timing, and when electric current began to descend, described accumulated value began to reduce, until be zero;
Step S3: the protection step, the maximum overload multiple and the described accumulated value that reach rated current when given electric current reach maximum overload after the time, and described current loop control circuit is reduced to rated current with given electric current.
Outstanding effect of the present invention is: can effectively reduce in long-time heavy load situation to exchange and become the oar motor and export the situation that large electric current burns always, improve production efficiency and security performance.
Following constipation closes the embodiment accompanying drawing, the specific embodiment of the present invention is described in further detail, so that technical solution of the present invention is easier to understand, grasp.
Description of drawings
Fig. 1 is the given current reduction process schematic diagram of the embodiment of the present invention 1, and wherein In represents rated current.
Embodiment
Embodiment 1
A kind of interchange of the present embodiment becomes the oar electric motor protective device, comprises exchanging the driver that becomes the oar motor, and driver comprises controls the given current loop control circuit of electric current loop, also comprises accumulator, and accumulator is connected with the current loop control circuit.As shown in Figure 1, exchange change oar motor protection method, comprise the following steps:
Step S1: setting steps, change electric current loop given in the current loop control circuit, it is 2 times that motor maximum overload multiple is set, the maximum overload time is 5 seconds;
Step S2: accumulation step, when electric current began to rise, it is cumulative that the accumulated value of accumulator begins timing;
Step S3: the protection step, after given electric current reached 2 times of rated current and accumulated value and surpassed for 5 seconds, the current loop control circuit was reduced to rated current with given electric current.
The present embodiment can effectively reduce in long-time heavy load situation to exchange and becomes that the oar motor is exported large electric current and the situation of burning has improved production efficiency and security performance always.
The present invention still has numerous embodiments, and all employing equivalents or equivalent transformation and all technical schemes of forming are within all dropping on protection scope of the present invention.
Claims (2)
1. one kind exchanges change oar electric motor protective device; comprise and exchange the driver that becomes the oar motor; described driver comprises controls the given current loop control circuit of electric current loop, and it is characterized in that: also comprise an accumulator, described accumulator is connected with described current loop control circuit.
2. one kind exchanges change oar motor protection method, it is characterized in that comprising the following steps:
Step S1: setting steps, change electric current loop given in described current loop control circuit, maximum overload multiple and maximum overload time are set;
Step S2: accumulation step, when electric current began to rise, it is cumulative that the accumulated value of described accumulator begins timing, and when electric current began to descend, described accumulated value began to reduce, until be zero;
Step S3: the protection step, the maximum overload multiple and the described accumulated value that reach rated current when given electric current reach maximum overload after the time, and described current loop control circuit is reduced to rated current with given electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104271278A CN103166190A (en) | 2011-12-19 | 2011-12-19 | Alternating current variable-pitch motor protection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104271278A CN103166190A (en) | 2011-12-19 | 2011-12-19 | Alternating current variable-pitch motor protection device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103166190A true CN103166190A (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2011104271278A Pending CN103166190A (en) | 2011-12-19 | 2011-12-19 | Alternating current variable-pitch motor protection device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301130A (en) * | 2015-05-13 | 2017-01-04 | 北京和利时电机技术有限公司 | The control method of a kind of automatic load shedding of motor-driven dynamic overload and system |
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| CN1044886A (en) * | 1990-02-01 | 1990-08-22 | 自贡市鸿鹤化工总厂 | High-low pressure Dimming for Discharge Lamps ignition device |
| CN2121771U (en) * | 1991-09-30 | 1992-11-11 | 重庆钢铁专科学校 | Starting economizer of a.c. nonsynchronous motor |
| JP2002354883A (en) * | 2001-05-22 | 2002-12-06 | Moric Co Ltd | Electric actuator |
| CN1796823A (en) * | 2004-11-18 | 2006-07-05 | Smc株式会社 | Actuator control system |
| CN101212133A (en) * | 2007-12-21 | 2008-07-02 | 王卫东 | Plastic-shell electromechanical integrated three-phase AC motor protector with energy storage and impact device |
| CN202042883U (en) * | 2011-01-10 | 2011-11-16 | 北京中纺锐力机电有限公司 | Overcurrent and overload protecting circuit |
| CN102257722A (en) * | 2008-10-28 | 2011-11-23 | 泽藤电机株式会社 | Inverter generator |
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2011
- 2011-12-19 CN CN2011104271278A patent/CN103166190A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044886A (en) * | 1990-02-01 | 1990-08-22 | 自贡市鸿鹤化工总厂 | High-low pressure Dimming for Discharge Lamps ignition device |
| CN2121771U (en) * | 1991-09-30 | 1992-11-11 | 重庆钢铁专科学校 | Starting economizer of a.c. nonsynchronous motor |
| JP2002354883A (en) * | 2001-05-22 | 2002-12-06 | Moric Co Ltd | Electric actuator |
| CN1796823A (en) * | 2004-11-18 | 2006-07-05 | Smc株式会社 | Actuator control system |
| CN101212133A (en) * | 2007-12-21 | 2008-07-02 | 王卫东 | Plastic-shell electromechanical integrated three-phase AC motor protector with energy storage and impact device |
| CN102257722A (en) * | 2008-10-28 | 2011-11-23 | 泽藤电机株式会社 | Inverter generator |
| CN202042883U (en) * | 2011-01-10 | 2011-11-16 | 北京中纺锐力机电有限公司 | Overcurrent and overload protecting circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301130A (en) * | 2015-05-13 | 2017-01-04 | 北京和利时电机技术有限公司 | The control method of a kind of automatic load shedding of motor-driven dynamic overload and system |
| CN106301130B (en) * | 2015-05-13 | 2019-04-05 | 北京和利时电机技术有限公司 | A kind of control method and system of the automatic load shedding of motor-driven dynamic overload |
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Application publication date: 20130619 |