CN103166209A - Device and method of direct current variable pitch motor protection - Google Patents
Device and method of direct current variable pitch motor protection Download PDFInfo
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- CN103166209A CN103166209A CN2011104271121A CN201110427112A CN103166209A CN 103166209 A CN103166209 A CN 103166209A CN 2011104271121 A CN2011104271121 A CN 2011104271121A CN 201110427112 A CN201110427112 A CN 201110427112A CN 103166209 A CN103166209 A CN 103166209A
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Abstract
The invention discloses a device of direct current variable pitch motor protection. The device comprises an actuator of a direct current series excited motor, the actuator comprises an electric current loop control circuit and further comprises an accumulator, wherein the electric current loop control circuit controls electric current loop reference, and the accumulator is connected with the electric current loop control circuit in series. According to the device and a method of the direct current variable pitch motor protection, the situation that under the long-time locked-rotor condition, the series excited motor outputs large currents all along to cause burning-up can be effectively reduced, and the production efficiency and the safety performance are improved.
Description
Technical field
The present invention relates to wind power generation field, relate in particular to protective device and method that a kind of direct current becomes the oar motor.
Background technology
at present, in wind field pitch-controlled system used, the direct current pitch-controlled system has occupied the very big market, the direct current pitch-controlled system is owing to directly returning oar by back-up source, thereby increased the reliability of system, in the direct current pitch-controlled system, direct current series-excited motor is because detent torque is large, the advantages such as overload capacity is strong, thereby become the first-selection that direct current becomes the oar motor, yet in the wind field practical application, usually find to have the situation that becomes the oar burn-down of electric motor to exist, trace it to its cause, has plenty of gear box stuck, having plenty of band-type brake does not unclamp, cause the very large even stall of motor load, thereby electric current is very large motor damage for a long time.
Because the series machine characteristic is softer, when the external loading torque surpasses motor output torque, motor speed can descend until be zero, electric current can rise at once, this characteristic is more useful in becoming the oar process, when becoming the prominent gust of wind of meeting in the oar process, when making change oar electric motor load torque exceed its output torque, become the oar motor rotation blockage, make blade position constant, after wind is little, then continue to forward blade to required angle position according to the master control order, avoided instantaneous its maximum power that exceeds of main generator power output.Although series DC machine overload capacity is stronger, if but motor stall always, drivers velocity ring output saturation, being that electric current loop is given is always maximum, suppose that maximum given electric current is 3 times of motor rated current, under the electric current loop effect, during stall, current of electric keeps 3 times of motor rated current outputs always, in the situation that the so large function of current, the time one, long motor must burn.
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 the method that direct current becomes the oar motor, prevent direct current machine for a long time, burn in the situation of large electric current.
Purpose of the present invention will be achieved by the following technical programs:
A kind of direct current becomes the oar electric motor protective device, comprises the driver of direct current series-excited 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 direct current becomes the oar motor protection method, comprises the following steps:
Step 1: change electric current loop given in described current loop control circuit, maximum overload multiple and maximum overload time are set;
Step 2: 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 3: 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 stall situation series machine and export the situation that large electric current burns always, enhance productivity 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 direct current of the present embodiment becomes the oar electric motor protective device, comprises the driver of direct current series-excited 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,, after the motor output current continued to remain the rated current twice and surpassed for 5 seconds, program was reduced to given value of current one times of rated current automatically.
Direct current becomes the oar motor protection method, comprises the following steps:
Step 1: change electric current loop given in the current loop control circuit, it is 3 times that the maximum overload multiple is set, and the maximum overload time is 5 seconds;
Step 2: when electric current began to rise, it is cumulative that the accumulated value of accumulator begins timing;
Step 3: after given electric current reached 3 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 reduce effectively that series machine in long-time stall situation is exported large electric current always and the situation of burning is enhanced productivity and security performance.
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. a direct current becomes the oar electric motor protective device; the driver that comprises direct current series-excited 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. the direct current of a direct current change oar electric motor protective device as claimed in claim 1 becomes the oar motor protection method, it is characterized in that comprising the following steps: change electric current loop given in described current loop control circuit, maximum overload multiple and maximum overload time are set; 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; 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 |
|---|---|---|---|
| CN2011104271121A CN103166209A (en) | 2011-12-19 | 2011-12-19 | Device and method of direct current variable pitch motor protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104271121A CN103166209A (en) | 2011-12-19 | 2011-12-19 | Device and method of direct current variable pitch motor protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103166209A true CN103166209A (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104271121A Pending CN103166209A (en) | 2011-12-19 | 2011-12-19 | Device and method of direct current variable pitch motor protection |
Country Status (1)
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| CN (1) | CN103166209A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060161274A1 (en) * | 2005-01-17 | 2006-07-20 | Mitutoyo Corporation | Position control device, measuring device and machining device |
| CN1861443A (en) * | 2005-05-12 | 2006-11-15 | 比亚迪股份有限公司 | Motor controlling method |
| CN101017366A (en) * | 2006-12-08 | 2007-08-15 | 清华大学 | Double generator redundancy control system |
| CN201616751U (en) * | 2009-12-10 | 2010-10-27 | 无锡福源自动化系统工程有限公司 | Device conducting origin positioning by stalling of DC motor |
| 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 |
-
2011
- 2011-12-19 CN CN2011104271121A patent/CN103166209A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060161274A1 (en) * | 2005-01-17 | 2006-07-20 | Mitutoyo Corporation | Position control device, measuring device and machining device |
| CN1861443A (en) * | 2005-05-12 | 2006-11-15 | 比亚迪股份有限公司 | Motor controlling method |
| CN101017366A (en) * | 2006-12-08 | 2007-08-15 | 清华大学 | Double generator redundancy control system |
| CN201616751U (en) * | 2009-12-10 | 2010-10-27 | 无锡福源自动化系统工程有限公司 | Device conducting origin positioning by stalling of DC motor |
| 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 |
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Application publication date: 20130619 |