CN201199677Y - Power supply control apparatus for motor - Google Patents
Power supply control apparatus for motor Download PDFInfo
- Publication number
- CN201199677Y CN201199677Y CNU2008200917398U CN200820091739U CN201199677Y CN 201199677 Y CN201199677 Y CN 201199677Y CN U2008200917398 U CNU2008200917398 U CN U2008200917398U CN 200820091739 U CN200820091739 U CN 200820091739U CN 201199677 Y CN201199677 Y CN 201199677Y
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- power
- frequency converter
- motor
- switcher
- frequency
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Abstract
The utility model relates to a power control device for a motor, which comprises a power frequency power connecting terminal, a frequency converter, a power switcher and a controller. The power frequency power connecting terminal is connected with one input end of the power switcher; the output end of the frequency converter is connected with other input end of the power switcher; the controller is used for controlling the operation of the frequency converter and outputting a power switching signal to the power switcher according to a motor starting and stop signal received from outer side; and the power switcher aims at connecting the power supply end of the motor to the output end of the frequency converter or connecting to power frequency power connecting terminal or connecting to the output end of the frequency converter and the power frequency power connecting terminal or hanging up the power supply end. The utility model relates to another power control device for a motor with identical innovative concept simultaneously. The power control device has the advantages that the motor can be quickly started and stopped, and the loss and harmonic wave problems caused by the drive of the frequency converter are reduced by using the frequency converter with less power.
Description
Technical field
The device that the utility model relates to the control electric motor starting and stops.
Background technology
At present, known electric motor starting and method of shutting down have several.Wherein commonplace is: the mode that 1) adopts the starting of star angle; 2) mode of employing soft starter; 3) with frequency converter startup, speed governing and stop.Preceding two kinds of start modes all are to come actuating motor by reducing the motor input voltage.Shortcoming is to start to reach the fail to start synchronous machine slowly.The third shortcoming is that motor drives with frequency converter for a long time, and consume and harmonic problem increase electric power.
The utility model content
The purpose of this utility model is the above-mentioned defective that overcomes prior art, at being in the power frequency running down, the frequent motor that needs starting and stop, provide two kinds to have identical motor power control device of opening one's minds, these two kinds of motor power control device can start and stop motor apace, but and starting and permanent magnet synchronous machine.
The first kind of technical scheme that the utility model proposes is as follows:
A kind of motor power control device, comprise power frequency supply binding post, frequency converter, power switcher, controller, an input of described power frequency supply binding post and power switcher joins, another input of the output of frequency converter and power switcher joins, controller is in order to according to the electric motor starting or the stop signal that receive from the outside, the operation of control of conversion device and to power switcher out-put supply switching signal.
As preferred implementation, motor power control device of the present utility model preferably also comprises the element that the frequency converter running status is detected, described controller is also according to the detection signal of frequency converter running status, the operation of control of conversion device and to power switcher out-put supply switching signal.Described controller can be PLC or single-chip microcomputer or industrial computer.
The second kind of technical scheme that the utility model proposes is as follows:
A kind of motor power control device, comprise power frequency supply binding post, frequency converter, power switcher, an input of described power frequency supply binding post and power switcher joins, another input of the output of frequency converter and power switcher joins, electric motor starting or stop signal that described frequency converter also receives from the outside in order to basis are to control power switcher out-put supply switching signal.
As preferred implementation, motor power control device of the present utility model preferably also comprises the element that the frequency converter running status is detected, and described frequency converter is also according to the detection signal to its running status, to power switcher out-put supply switching signal.
The technique effect that the utility model had is:
The device that adopts the utility model to provide, utilize controller to receive outside electric motor starting and cease and desist order, and by status monitoring to frequency converter, can control the work of power switcher quickly, start and stop motor apace, and can the starting and permanent magnet synchronous machine, having can be at motor generally under the situation of power frequency work, if reduce the advantage because of driving the loss that causes and harmonic problem with frequency converter for a long time and can use more low power frequency converter during non-loaded or underload when starting.
Description of drawings
Fig. 1: the structural representation of motor power control device of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Referring to Fig. 1, motor power control device of the present utility model comprises power frequency supply binding post, frequency converter, power switcher, controller several sections.Power switcher adopts the switch of two inputs, one output, and one of them input is connected on the power frequency supply binding post.The output of frequency converter is connected on another input of power switcher.Controller links to each other with power switcher with frequency converter respectively.
Controller can link to each other with outside microsystem, perhaps directly links to each other with keyboard input devices, receives external motor and starts or stops signal.Controller also passes through the detection signal of the input interface reception of oneself to the frequency converter running status, and start or stop the detection signal of signal and frequency converter running status according to external motor, send control command by the corresponding output interface on the controller to frequency converter and power switcher respectively.
In the present embodiment, the power frequency supply that is connected the input of frequency converter and power switcher is same power supply, and in the practical application, both need not be identical, can be different power supplys.Present embodiment is in order to improve the control effect, the detection signal that the element that controller has also been considered the frequency converter running status is detected to the switching command of power switcher is imported.This kind detecting element generally is that frequency converter itself carries, and general frequency converter is detected state and export and offer controller state at that time with itself numeral (switch) or simulation voluntarily, also can be discrete component.In actual applications, controller also can be only according to the electric motor starting of outside with cease and desist order and send control command.
Below in conjunction with embodiment the workflow of device of the present utility model is done introduction.When the work period began, the external system that is connected this device can be sent and require the actuating motor instruction. and this moment, power switcher can be received frequency converter output to motor power.Frequency converter can accelerate to working speed to motor within a certain period of time.After motor reached working speed, frequency converter just can be synchronous with three phase worker power output, to guarantee the consistency of rotating magnetic field after the motor power conversion.Herein can be synchronously Frequency Synchronization also can be frequency and phase place synchronously.Synchronous back controller just can send signal to switching device shifter the motor power supply is connected on the power frequency.Switch when carrying out, have a period of time motor according to actual conditions and powered by frequency converter and power frequency.
After the work period finished, external system can be sent motor to this device and stop requirement. and controller just can send to frequency converter and require halt instruction this moment.After frequency converter receives this instruction, just can be synchronous with the three phase mains that connects motor output, to guarantee the consistency of rotating magnetic field behind the motor input power conversion.Herein can be synchronously Frequency Synchronization also can be frequency and phase place synchronously.Synchronous back controller just can be controlled power switcher the motor power supply is connected on the frequency converter.Switch when carrying out, have a period of time motor according to actual conditions and powered by frequency converter and power frequency.Switch the back frequency converter can be within a certain period of time motor speed reduce to zero or lower rotating speed on, reach because of output and reduce (slow-speed of revolution) or 0 output (0 rotating speed) reaches the energy-saving effect that causes.
When the work period began again, more than action repeated.
If load is a controllable size, the rated power of frequency converter must be equally not big with power of motor, only needs enough within a certain period of time motor to be accelerated near working speed (under the situation of 50Hz power frequency 4 utmost point motors being exactly～1500 commentaries on classics/per minutes) just can.But before switching to power frequency supply, must be controlled at load in the scope that transducer power can bear. so just can lower the cost of frequency converter greatly.Certainly just can be after motor switches to the power frequency supply power supply according to the job requirement control load.
Workflow when for example, utilizing this device control injection molding machine motor is as follows:
Start flow process: when an injection cycle cooling section is finished for the previous period, injection molding machine computer or other control system just can send to this device and require the electric motor starting instruction.After device receives this instruction, just can in the short as far as possible time, accelerate to working speed to motor.After motor reached working speed, frequency converter just can be synchronous with three phase worker power output, to guarantee the consistency of rotating magnetic field after the conversion of motor power supply source.The back power switcher just can be connected to the motor power supply on the power frequency synchronously. and at this time injection molding machine just can cool off the action after finishing and enter next injection cycle.The setting that cooling section is finished for the previous period should be greater than the time that motor quickened and switched to power frequency.
Stop flow process: all need (generally being in the cooling section after melten gel finishes) after the action of oil pump feed before injection molding machine is finished the one-period die sinking, and injection molding machine computer or other control system just can send to this device and require motor to slow down or halt instruction.After device receives this instruction, just can be in the short as far as possible time motor be decelerated in the zero-speed or the slow-speed of revolution that some are predetermined, reaches and cause energy-conservation effect.When the cooling section in this cycle is finished for the previous period, just heavily be covered with the described electric motor starting flow process of face again.
Among the above embodiment, controller adopts independent devices, for example can be PLC, can be single-chip microcomputer, also can be industrial computer.The utility model can also make full use of existing hardware device, does not adopt the controller of discrete component, but the function of controller is integrated in the frequency converter, utilizes the switching controls of the programming realization of frequency converter to power switcher.
Claims (5)
1. motor power control device, comprise power frequency supply binding post, frequency converter, power switcher, controller, an input of described power frequency supply binding post and power switcher joins, another input of the output of frequency converter and power switcher joins, controller is in order to according to the electric motor starting or the stop signal that receive from the outside, the operation of control of conversion device and to power switcher out-put supply switching signal.
2. motor power control device according to claim 1, it is characterized in that, described motor power control device comprises the device that the frequency converter running status is detected, described controller is also according to the detection signal of frequency converter running status, the operation of control of conversion device and to power switcher out-put supply switching signal.
3. motor power control device according to claim 1 is characterized in that, described controller is PLC or single-chip microcomputer or industrial computer.
4. motor power control device according to claim 1, it is characterized in that, described motor power control device comprises the device that the frequency converter running status is detected, and described frequency converter is controlled power switcher out-put supply switching signal according to the detection signal to its running status.
5. motor power control device, comprise power frequency supply binding post, frequency converter, power switcher, an input of described power frequency supply binding post and power switcher joins, another input of the output of frequency converter and power switcher joins, described frequency converter is controlled power switcher out-put supply switching signal also according to the electric motor starting or the stop signal that receive from the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200917398U CN201199677Y (en) | 2008-01-18 | 2008-01-18 | Power supply control apparatus for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200917398U CN201199677Y (en) | 2008-01-18 | 2008-01-18 | Power supply control apparatus for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201199677Y true CN201199677Y (en) | 2009-02-25 |
Family
ID=40450827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200917398U Expired - Fee Related CN201199677Y (en) | 2008-01-18 | 2008-01-18 | Power supply control apparatus for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201199677Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753408A (en) * | 2015-03-20 | 2015-07-01 | 苏寿喜 | High power motor switching control system and switching method |
| CN105281608A (en) * | 2014-05-26 | 2016-01-27 | 株洲变流技术国家工程研究中心有限公司 | High-voltage variable frequency and power frequency switching method |
| CN107408901A (en) * | 2015-03-10 | 2017-11-28 | 株式会社明电舍 | Synchronizing Control Devices for electric power converter |
| CN113014159A (en) * | 2019-12-19 | 2021-06-22 | 丹东山川电机有限公司 | Motor starting method for testing performance of TYCD self-starting permanent magnet synchronous motor |
-
2008
- 2008-01-18 CN CNU2008200917398U patent/CN201199677Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281608A (en) * | 2014-05-26 | 2016-01-27 | 株洲变流技术国家工程研究中心有限公司 | High-voltage variable frequency and power frequency switching method |
| CN105281608B (en) * | 2014-05-26 | 2019-01-22 | 株洲变流技术国家工程研究中心有限公司 | A kind of switching method of high-pressure frequency-conversion and power frequency |
| CN107408901A (en) * | 2015-03-10 | 2017-11-28 | 株式会社明电舍 | Synchronizing Control Devices for electric power converter |
| CN107408901B (en) * | 2015-03-10 | 2020-07-07 | 株式会社明电舍 | Synchronous control device for power converter |
| CN104753408A (en) * | 2015-03-20 | 2015-07-01 | 苏寿喜 | High power motor switching control system and switching method |
| CN113014159A (en) * | 2019-12-19 | 2021-06-22 | 丹东山川电机有限公司 | Motor starting method for testing performance of TYCD self-starting permanent magnet synchronous motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090225 Termination date: 20100220 |