CN202676335U - Locked rotor torque detection device of three-phase permanent-magnet synchronous motor - Google Patents
Locked rotor torque detection device of three-phase permanent-magnet synchronous motor Download PDFInfo
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- CN202676335U CN202676335U CN 201220282396 CN201220282396U CN202676335U CN 202676335 U CN202676335 U CN 202676335U CN 201220282396 CN201220282396 CN 201220282396 CN 201220282396 U CN201220282396 U CN 201220282396U CN 202676335 U CN202676335 U CN 202676335U
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Abstract
The utility model discloses a locked rotor torque detection device of a three-phase permanent-magnet synchronous motor. The locked rotor torque detection device mainly comprises a motor, a torque detection device, a direct current power source, a current meter and a winding connector; an output end of the direct current power source is connected with a wiring end of the winding connector, and applies direct current required by torque detection on the motor; the current meter is connected between the direct current power source and the winding connector; and a torque output end of the motor is connected with the torque detection device. With the locked rotor torque detection device provided by the utility model, relative positions of a stator and a rotor can be adjusted through the utilization of a marked reference zero position so as to keep the orthogonality of a stator magnetic field and a rotor magnetic field, and then, torque detection can be performed without any extra rotor position sensor and alternating current servo driver required, thereby simplifying the complexity of the torque detection device and reducing detection cost.
Description
Technical field
The utility model relates to the motor detection technique, relate in particular to the locked-rotor torque pick-up unit of three-phase permanent-magnetic synchronous motors, such motor is called again permagnetic synchronous motor (PMSM, Permanent Magnet Synchronous Motor), in GB GB/T21418-2008 " permanent magnet brushless electromotor system general technical specifications " also referred to as permanent magnetic Ac servo motor, its three phase winding generally adopts the Y-connection mode, is that the line counter potential waveform is approximately sinusoidal wave permanent magnet brushless electromotor.
Background technology
Motor, as a kind of typical energy conversion device, realizes converting electrical energy into the function of mechanical energy.The power input voltage available V of U(unit of motor) with the product of electric current I (A of unit), weigh, and the rad/s of output speed n(unit output power for) and export the N.m of torque T(unit) product weigh.Output torque T, as the basic measurement index of motor fan-out capability, is necessary detection index.
When three-phase permanent-magnetic synchronous motors moves in motor synchronizing, require to motor three phase winding inputs and stator, the relevant three phase sine electric current of rotor relative position θ, so that motor is exported constant machine torque to load.
Iu=I*sin(θ)；
Iv=I*sin(θ-2*π/3)；
Iw=I*sin(θ-4*π/3)。
In above formula, Iu, Iv, Iw are respectively three-phase currents, and I is phase current magnitude.Stator, rotor relative position θ change along with the rotation of motor.
When the motor continuous rotation and while exporting constant torque, need to keep the phase current magnitude I be input on three phase windings constant, and the electric current that imposes on three phase windings should change according to the change of motor stator, rotor relative position θ.
In order to measure the output torque of motor under certain phase current magnitude input condition, must guarantee the correct current value of input in motor three phase windings, therefore must adopt suitable position sensing mode accurately to measure the relative position θ of motor stator, rotor.
Generally, the Direct Torque of three-phase permanent-magnetic synchronous motors detects and motor, position transducer and AC servo driver need to be formed to the permanent magnet brushless electromotor system, and carries out under the torque Controlling operation method.This method must configure AC servo driver and rotor-position sensor.Be compared to direct supply, the AC servo driver price of large electric current is high, especially, when the separately-loaded motor being carried out to the torque detection, also must consider the installation of rotor-position sensor.This has increased complicacy and the testing cost of torque master undoubtedly.
Fig. 1 is existing torque master schematic diagram, as shown in Figure 1, while using this pick-up unit, the tester applies torque by the current-order that is input to AC servo driver to the motor winding and detects needed electric current, then measures the output torque of motor with torque detection.When not possessing AC servo driver and rotor-position sensor, can't adopt classic method to carry out the torque testing of three-phase permanent-magnetic synchronous motors.
Summary of the invention
In view of this, the locked-rotor torque pick-up unit that fundamental purpose of the present utility model is to provide a kind of three-phase permanent-magnetic synchronous motors, can save rotor-position sensor and AC servo driver, simplifies torque master, to reduce testing cost.
For achieving the above object, the technical solution of the utility model is achieved in that
A kind of locked-rotor torque pick-up unit of three-phase permanent-magnetic synchronous motors, comprise motor, torque detection, direct supply, reometer and winding connector; The output terminal of described direct supply applies torque to motor and detects needed DC current after connecting the terminals of winding connector; Between described direct supply and winding connector, also be connected to reometer; The torque output terminal of described motor is connected with described torque detection.
Wherein, the connected mode of described winding connector is: after any two-phase winding parallel, then connect with a remaining phase winding; Two windings after described series, parallel draw the positive and negative electrode that the end of a thread is connected to respectively direct supply.
The connected mode of described winding connector is: the two-phase winding leading-out wire is connected to respectively the positive and negative electrode of direct supply arbitrarily, and a remaining phase winding is unsettled.
The locked-rotor torque pick-up unit of three-phase permanent-magnetic synchronous motors provided by the utility model has the following advantages:
Adopt pick-up unit of the present utility model, utilize the reference zero-bit that mark is good, adjust the relative position of stator and rotor to keep stator field and rotor field quadrature just can carry out torque testing, can save extra rotor-position sensor and AC servo driver in existing torque master, thereby simplified the complicacy of torque master, reduced testing cost.
The accompanying drawing explanation
Fig. 1 is existing torque master schematic diagram;
Fig. 2 is locked-rotor torque pick-up unit schematic diagram of the present utility model;
Fig. 3 is locked-rotor torque detection method process flow diagram of the present utility model
The winding connection one that Fig. 4 is motor;
The winding connection two that Fig. 5 is motor.
Embodiment
Below in conjunction with accompanying drawing and embodiment of the present utility model, pick-up unit of the present utility model is described in further detail.
Fig. 2 is locked-rotor torque pick-up unit schematic diagram of the present utility model, as shown in Figure 2, under motor stall state, adopt direct supply, the motor winding is applied to torque and detect needed DC current, with torque detection, measure the electromagnetic torque of motor when stator field and the rotor field quadrature.Be specially: the output terminal of described direct supply applies torque to motor and detects needed DC current after connecting the terminals of winding connector; Between described direct supply and winding connector, also be connected to reometer; The torque output terminal of described motor is connected with described torque detection.
Utilize said apparatus when detecting, reference zero-bit that only need be good with reference to mark described in following steps 301, adjust the relative position of stator and rotor to keep stator field and rotor field quadrature just can carry out torque testing, thereby without extra rotor-position sensor and AC servo driver, thereby simplified the complicacy of torque master, reduced testing cost.
Fig. 3 is locked-rotor torque detection method process flow diagram of the present utility model, and as shown in Figure 3, the method mainly comprises the steps:
Step 301: motor is placed in to light condition, by direct supply, winding is applied to certain electric current, motor stator magnetic field and rotor field are attracted each other and be locked in ad-hoc location, and stator and rotor relative position now are labeled as with reference to zero-bit.
Here, the winding connection while applying electric current mainly contains following two kinds, respectively as shown in Figure 4 and Figure 5.It should be noted that: the U phase of mark, V phase, W are only for convenience of description and the sign flag adopted that the motor three-phase symmetric winding has virtually no essential distinction mutually.
Winding connection one as shown in Figure 4: after any two-phase winding parallel, then connect with a remaining phase winding.Draw the positive and negative electrode that the end of a thread is connected to respectively direct supply for two after described series, parallel.The phase current magnitude when electric power outputting current under this kind of connected mode equals motor and drives according to sinusoidal wave mode.
Winding connection two as shown in Figure 5: the two-phase winding leading-out wire is connected to respectively the positive and negative electrode of direct supply arbitrarily, and a remaining phase winding is unsettled.0.866 times of phase current magnitude when the electric power outputting current under this kind of connected mode equals motor and drives according to sinusoidal wave mode.
Step 302: keep the motor winding connection constant, the reference zero-bit that the step 301 of take is determined is benchmark, by motor stator or rotor n*360 ± 90
.electrical angle, make motor stator magnetic field and rotor field quadrature.Wherein, the integer between 0≤n<motor number of pole-pairs p, positive sign (+), negative sign (-) be the different torque direction of correspondence respectively.Motor torque measuring position when this position is torque testing.
Step 303: with direct supply, the motor winding is applied to torque and detect needed locked rotor current, with torque detection, measure the electromagnetic torque of motor under this electric current.
We take a motor of our company's autonomous Design manufacture is example, and while adopting the torque detection method shown in Fig. 1 to record the 1.6A electric current, motor output torque is 0.85N.m.
And locked-rotor torque pick-up unit of the present utility model and the detection method shown in employing Fig. 2 and Fig. 3, and according to the winding connection one shown in Fig. 4, adjust direct supply voltage and equal 1.6*1.4142 so that the reometer reading is 2.26A(), the output torque that records motor is 0.83N.m.It is only 2.4% that two kinds of method of testing measurement results differ.
The above, be only preferred embodiment of the present utility model, is not intended to limit protection domain of the present utility model.
Claims (3)
1. the locked-rotor torque pick-up unit of a three-phase permanent-magnetic synchronous motors, comprise motor and torque detection, it is characterized in that, also comprises direct supply, reometer and winding connector; The output terminal of described direct supply applies torque to motor and detects needed DC current after connecting the terminals of winding connector; Between described direct supply and winding connector, also be connected to reometer; The torque output terminal of described motor is connected with described torque detection.
2. the locked-rotor torque pick-up unit of three-phase permanent-magnetic synchronous motors according to claim 1, is characterized in that, the connected mode of described winding connector is: after any two-phase winding parallel, then connect with a remaining phase winding; Two windings after described series, parallel draw the positive and negative electrode that the end of a thread is connected to respectively direct supply.
3. the locked-rotor torque pick-up unit of three-phase permanent-magnetic synchronous motors according to claim 1, it is characterized in that, the connected mode of described winding connector is: the two-phase winding leading-out wire is connected to respectively the positive and negative electrode of direct supply arbitrarily, and a remaining phase winding is unsettled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220282396 CN202676335U (en) | 2012-06-15 | 2012-06-15 | Locked rotor torque detection device of three-phase permanent-magnet synchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220282396 CN202676335U (en) | 2012-06-15 | 2012-06-15 | Locked rotor torque detection device of three-phase permanent-magnet synchronous motor |
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| CN202676335U true CN202676335U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220282396 Expired - Fee Related CN202676335U (en) | 2012-06-15 | 2012-06-15 | Locked rotor torque detection device of three-phase permanent-magnet synchronous motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735381A (en) * | 2012-06-15 | 2012-10-17 | 北京中陆航星机械动力科技有限公司 | Locked-rotor torque detection device and method for three-phase permanent magnet synchronous motor |
| CN104412085A (en) * | 2013-06-24 | 2015-03-11 | 贝内克+赖纳工业电子有限公司 | Method for the functional testing of a holding brake of an electric motor |
-
2012
- 2012-06-15 CN CN 201220282396 patent/CN202676335U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735381A (en) * | 2012-06-15 | 2012-10-17 | 北京中陆航星机械动力科技有限公司 | Locked-rotor torque detection device and method for three-phase permanent magnet synchronous motor |
| CN102735381B (en) * | 2012-06-15 | 2015-01-21 | 北京中陆航星机械动力科技有限公司 | Locked-rotor torque detection device and method for three-phase permanent magnet synchronous motor |
| CN104412085A (en) * | 2013-06-24 | 2015-03-11 | 贝内克+赖纳工业电子有限公司 | Method for the functional testing of a holding brake of an electric motor |
| CN104412085B (en) * | 2013-06-24 | 2017-10-10 | 贝内克+赖纳工业电子有限公司 | The method for carrying out functional test for the retaining brake to motor |
| US9897156B2 (en) | 2013-06-24 | 2018-02-20 | B&R Industrial Automation GmbH | Method for functional testing of a holding brake of an electric motor |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20200615 |
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| CF01 | Termination of patent right due to non-payment of annual fee |