CN1070657C - Motor controller - Google Patents
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- CN1070657C CN1070657C CN95197970A CN95197970A CN1070657C CN 1070657 C CN1070657 C CN 1070657C CN 95197970 A CN95197970 A CN 95197970A CN 95197970 A CN95197970 A CN 95197970A CN 1070657 C CN1070657 C CN 1070657C
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Abstract
The present invention relates to a motor controller which comprises a power circuit and a motor driving circuit, wherein the power circuit rectifies an AC power supply, and is used for outputting anticipated DC voltage and improving the power factor of the AC power supply simultaneously; the motor driving circuit is used for driving a motor. The controller comprises a rectifier circuit, a filter circuit, a converter circuit, a motor drive, a converter control circuit, an inverter control circuit, a speed detector circuit, a speed control circuit and a DC voltage control circuit, wherein the rectifier circuit and the filter circuit are used for converting the AC power supply to a DC power supply; the converter circuit is composed of a chopper circuit and is used for utilizing switching control operation and the energy storage function of an inductor to control the DC voltage; the motor drive is composed of an output terminal connected to the converter circuit, and an inverter circuit on the motor; the converter control circuit is used for controlling the switching operation of the chopper circuit; the inverter control circuit is used for controlling the switching operation of the inverter circuit to drive the motor; the speed detector circuit is used for detecting the position of a rotor of the motor and calculating the speed of the motor; the speed control circuit receives the calculated speed value and the calculated speed command value and is used for controlling the speed of the motor through the inverter circuit; the DC voltage control circuit receives output signals of the speed control circuit and is used for controlling the DC voltage through the converter control circuit according to the output signals. When the output of the speed control circuit reaches a predetermined value, the DC voltage control circuit outputs signals to the converter control circuit so that the DC voltage is increased or reduced. The output of the speed control circuit is duty cycle.
Description
The present invention relates to a kind of motor controller, it is made of the power circuit of the power factor of the AC power supplies rectification being improved simultaneously AC power supplies in order to output expection dc voltage and the motor drive circuit that is used for drive motor.
A motor controller is disclosed in the patent Hei6-105563 of Japan's bulletin, its for to the AC power supplies rectification in order to becoming the rectification circuit of DC power supply, and motor is carried out speed control by fully utilizing a power circuit and a motor drive circuit that is suppressed at the harmonic wave that produces in the source current.
This motor controller is made of with the inverter circuit that is used for drive motor a converter circuit that improves power factor, last converter circuit adopts boost chopper circuit, carry out simultaneously the harmonic wave in the source current is suppressed and to the control of dc voltage, when hanging down load, this motor controller control dc voltage makes it to be taken as the minimum voltage value that can improve power factor and utilizes this inverter circuit to control by PWM motor is carried out rotating speed control, and when high capacity, the PWM control that termination is undertaken by inverter is that PAM control is carried out speed control to motor but control by the dc voltage that utilizes converter.
In above-mentioned prior art, the structure of the structure of electromotor velocity control circuit when low load with in high capacity the time is different, need carry out different speed control operations according to load condition.That is, when hanging down load, calculate the duty ratio of the pwm signal that is used for inverter by velocity deviation, and when high capacity, instruct by the dc voltage of velocity deviation calculating for converter.
In addition, according to changing between control circuit and the control circuit during in high capacity when the low load for the dc voltage value command speed value of the duty ratio correspondence of the pwm signal of inverter and speed at that time.
Yet, in above-mentioned prior art, need be used for two kinds of speed control circuits of low load running and high capacity operation, so control circuit becomes complicated.
In addition, owing to utilize a lot of different signals to be identified for the conversion of two kinds of control circuits of low load running and high capacity operation, need a lot of detector circuits.
The objective of the invention is to solve the problems referred to above that prior art exists, and a kind of motor controller is provided, it can utilize a simple speed control circuit to carry out electromotor velocity control, and no matter be low load or high capacity.
Motor controller of the present invention comprises: the rectifier circuit and the filter circuit that are used for AC power supplies is transformed to the DC power supply; By the converter circuit that chopper circuit constitutes, be used for by utilizing the energy storage effect control dc voltage of switching manipulation and reactor; Motor drive is made of the inverter circuit that is connected on converter circuit output and the motor; Be used to control the converter control circuit of the switching manipulation of chopper circuit; The inverter control circuit of switching manipulation that is used for the inverter circuit of controlling and driving motor; The speed detector circuit is used to detect motor rotor position and calculating motor speed; Speed control circuit receives the velocity amplitude and the speed value that calculate, is used for by inverter control circuit motor being carried out speed control; Dc voltage control circuit, the output signal of inbound pacing control loop are used for controlling dc voltage according to this output signal by converter control circuit.
As a preferred embodiment, the dc voltage control circuit is suitable for to the converter control circuit output signal, when the output of speed control circuit reaches predetermined value, dc voltage is increased or reduction.
As a preferred embodiment, the dc voltage control circuit is suitable for by converter control circuit control dc voltage, so that the output of speed control circuit is taken as predetermined value.
According to a preferred embodiment, provide of the output of the speed deviation signal of the velocity amplitude of duty cycle signals or calculating and speed value as speed control circuit.
According to a preferred embodiment, motor controller also comprises dc voltage fluctuation correcting circuit, detects the wave component of dc voltage, is used for changing to according to this wave component the input signal of inverter control circuit.
In said structure, inverter control circuit is according to driving switching device in the inverter so that drive motor from the position signalling of speed detector circuit with from the duty cycle signals of speed control circuit.The speed detector electric circuit inspection is by the voltage of motor-induced and the position of being calculated rotor by the voltage of this induction, position signalling so that impulse form output detects provides the velocity amplitude identical with the velocity amplitude that detects by the position signalling computational speed of calculating and to speed control circuit simultaneously.Speed control circuit calculates the duty cycle signals of the pwm pulse that is used for inverter by external speed command value and detection speed value, so that the velocity deviation vanishing.Inverter circuit, electromotor velocity testing circuit, inverter control circuit and speed control circuit constitute an electromotor velocity control circuit, according to the external speed command value motor are carried out speed control.The converter control circuit basis is from the switching device of the signal controlling chopper circuit of dc voltage control circuit.The output signal of dc voltage control circuit detection dc voltage and speed control circuit is duty cycle signals for example, and control dc voltage like this, provide a predetermined value with dc voltage when promptly when duty cycle signals reaches predetermined value, for example reaching the higher limit of duty cycle signals scope, and when duty cycle signals reaches lower limit, dc voltage reduced a predetermined value.Converter circuit, converter control circuit and dc voltage control circuit constitute converter the dc voltage control circuit, and control dc voltage whereby.
By comprehensive electromotor velocity control circuit and converter dc voltage control circuit and make two circuit relevant works, with regard to realizing the speed of motor is controlled and irrelevant with the load condition of motor by utilizing simple structure.
Fig. 1 is the calcspar according to the motor controller of the first embodiment of the present invention, and Fig. 2 is the schematic diagram of expression as the dc voltage control circuit structure of a component part of electric controller.
Fig. 3 and 4 is the schematic diagrames that are used to explain according to the operating characteristic of the motor controller of first embodiment of the invention.
Fig. 5,6,7, the 8th, the expression conduct is according to the schematic diagram of other structure of the dc voltage control circuit of a component part of the motor controller of the first embodiment of the present invention;
Fig. 9 and Figure 10 are the schematic diagrames that is used to explain according to the operating characteristic of the motor controller of the first embodiment of the present invention, and its middle controller adopts the dc voltage control circuit shown in Fig. 7 and 8.
Figure 11 is the schematic diagram of expression conduct according to the another kind of structure of the dc voltage control circuit of a component part of the motor controller of the first embodiment of the present invention.
Figure 12 is the calcspar of motor controller according to another embodiment of the present invention, and Figure 13 is the schematic diagram of expression as the dc voltage control circuit structure of a component part of electromotor control circuit.
Figure 14 is the calcspar of motor controller according to still a further embodiment, and Figure 15 explains the schematic diagram to dc voltage pulsation correct operation that carries out in motor controller.
Figure 16 is the calcspar that adopts the air conditioner of motor controller of the present invention.
Figure 17 is the schematic diagram of expression as the modular converter module structure of the part of motor controller structure of the present invention.
With reference to the accompanying drawings the present invention is described in detail.
Fig. 1 and Fig. 2 are the schematic diagrames that is used to explain first embodiment of motor controller of the present invention.Fig. 1 is that it comprises by the overall construction drawing of motor controller: adopt rectifier circuit and the converter circuit of boost chopper circuit and motor drive circuit and the motor that is made of inverter circuit.
AC power supplies 1 is connected to converter circuit 2 and by converter circuit 2 output dc voltages, and this converter circuit 2 is made up of the boost chopper circuit that rectifier circuit and is made of reactor, diode and transistor.Boost chopper circuit in converter circuit 2 is connected to the outlet side of the rectifier circuit in converter circuit 2, and utilizes flowing of transistorized on-off action control input current, and utilizes the energy storage of reactor to be used for boosted voltage.Boosted dc voltage is provided to filtering capacitor, is pressed by its output galvanic current.
The inverter 3 that links to each other with synchronous motor 4 is connected to the filtering capacitor in converter circuit 2, and will be transformed to AC voltage by the dc voltage that filtering capacitor provides so that drive synchronous motor 4.
The position that speed detector circuit 5 calculates magnetic pole according to the voltage that is produced by synchronous motor 4, and position signalling outputed to inverter control circuit 6.It also carries out speed calculation according to the position signalling that calculates, and the velocity amplitude that detects is outputed to speed control circuit 7.
Inverter control circuit 6 drives the transistor in inverter 3, with this speed control for synchronous motor 4 according to producing drive signal from the detection position signal of speed detector circuit 5 with from the duty cycle signals of speed control circuit 7.
Converter control circuit 8 is according to the transistor of current instruction value driving in converter circuit 2 from dc voltage control circuit 9, and control is input to the electric current of converter 2, make it to have sinusoidal waveform, improve the power factor of power supply, control dc voltage simultaneously with this.
Dc voltage control circuit 9 detects the duty cycle signals as the output of speed control circuit 7, and according to the Numerical Control dc voltage of duty cycle signals.
Fig. 2 represents the internal structure of dc voltage control circuit 9.Dc voltage control circuit 9 comprises: selector circuit 93 and multiplexer 95, they select a plurality of dc voltage command value of producing by dc voltage command value generator circuit 96 according to duty cycle signals one of them also export selected signal; Detector circuit 94 detects the DC output voltage from converter 2, and it is transformed to numerical value can be used for magnitude of voltage, proportional component 91 and integral element 92 in the control circuit 2.
The computing of proportional component 91 and integral element 92 makes can vanishing with the deviation of the dc voltage detecting value that is formed by the dc voltage command value, and this result is exported as current-order.
Utilize this to be used to explain the control characteristic of Fig. 3 presentation selector circuit 93 of control operation characteristic.Fig. 3 is a curve chart, and the rotating speed of X-direction axle power taking motivation is got dc voltage, motor voltage and duty ratio along ordinate.This curve is shown under the constant load motor voltage, dc voltage and duty ratio with change in rotational speed.
When motor was in low velocity and for example starts, selector 93 outputs one switching signal was so that dc voltage command value 1 is selected, and dc voltage control circuit 9 control dc voltages are to be taken as the dc voltage command value of selection.
Since low in this stage voltage of controlled dc voltage, reach 100% in its commitment duty ratio that increases rotary speed, therefore, can not increase the rotating speed (some A) of motor again.In this point, selector circuit 93 outputs one switching signal is so that select dc voltage command value 2 to be transported to multiplexer 95.Multiplexer 95 selects dc voltage to be taken as dc voltage command value 2.Therefore, duty ratio is reduced to 60% suddenly, and motor voltage raises.Though shown in situation under, the duty ratio minimum value is decided to be 60%, this numerical value only for convenience of explanation.In fact, according to load condition, the response speed of the rotating speed of motor, speed control circuit 7 and other amount, rapid variation does not take place in duty ratio.
Along with motor speed increases, duty ratio becomes 100% (some B) once more.So, carry out above-mentioned control once more, select dc voltage command value 3, therefore, dc voltage increases, and duty ratio drops to 60%.
By repeating above-mentioned control operation, dc voltage increases with the increase of rotating speed, therefore, can carry out electromotor velocity control.
To introduce situation about reducing below with above-mentioned opposite electromotor velocity.
When the motor high speed rotating, when reducing the reduction of instruction motor rotating speed owing to input speed, duty ratio descends, the electric electromechanics drops.When duty ratio became 60% (some C), with above-mentioned opposite, the dc voltage command value was transformed into dc voltage command value 3 by dc voltage command value 4, so dc voltage descends.When dc voltage descended, duty ratio increased, and institute's peek value is near 100%.Here the reduction of dc voltage must be set, so that when dc voltage descends, this numerical value will can not cause that duty ratio surpasses 100%.
In order further to reduce rotating speed, duty ratio descends, and the dc voltage command value is transformed into this dc voltage command value 2 at a B place by dc voltage command value 3.By repeating these operations, the rotating speed of motor is controlled.
By repeating aforesaid operations, duty ratio keeps all the time near 100%, and motor voltage also can remain near the required voltage of motor.Therefore, the loss aspect that the state of motor and inverter produces therein can be improved, and motor can drive according to higher motor efficiency, and inverter efficiency can remain at good state.In addition, because to converter, dc voltage need not rise greater than desirable value, transducer effciency can improve.
In addition, owing to the rotating speed of dc voltage according to motor can change, a single circuit just can guarantee that motor is risen at a high speed by low speed.In other words, utilize a controller also can guarantee even, make it to operate in operating point efficiently all the time in the operation of the different various motor in motor designs working point.
Fig. 4 is the schematic diagram that is used to explain control operation characteristic under certain conditions, and promptly the transfer point of dc voltage accumulates in than a more high-revolving side in than situation shown in Figure 3.The basic operation here is with identical in situation shown in Figure 3.Different with it a bit is, is decided to be 100% and 90% at the duty ratio numerical value of dc voltage transfer point.
Owing to use boost chopper circuit and dc voltage in converter circuit 2 can not be reduced to 2 of the voltage of reception
1/2Doubly, the control operation mode shown in Fig. 4 than shown in Fig. 3 more effective aspect the practical operation.In addition, though described converter circuit adopts boost chopper circuit in present embodiment is introduced, even adopt step-up/down chopper circuit or similar circuit and also can carry out identical control operation and also can adopt the converter circuit that can reduce dc voltage when converter circuit.
In above-mentioned part, be that selection level according to the dc voltage command value is 4 kinds briefing to the example of control operation.Yet, the dc voltage command value can be determined more subtly.In addition, because dc voltage can be in wideer scope inner control, as long as circuit structure allows preferably to increase the number of selectable dc voltage command value.
Though in the example of the dc voltage control circuit shown in Fig. 2, current instruction value is that the dc voltage command value can directly be calculated by the deviation calculation of dc voltage.
Fig. 5 is expression and schematic diagram in the internal structure of the embodiment of the different dc voltage control circuit of the control circuit of dc voltage shown in Fig. 2.The difference of itself and Fig. 2 is dc voltage command generator circuit 98 and dc voltage detector circuit 97.In system shown in Figure 5, a dc voltage command value is only arranged and be provided with a plurality of detector circuits 97.Other circuit function is identical with Fig. 2.
In example shown in Figure 5, the switching signal conversion multiplexer 95 that produces when utilizing selector circuit 93 to receive duty cycle signals, therefore in a plurality of detectors is selected.According to detection signal from selected detector circuit, the control dc voltage.In addition, in this system, can carry out as in the various control operations as shown in Fig. 3 and Fig. 4, and can obtain identical effect.Here, detector circuit 97 is one to be used for dc voltage is transformed to the voltage level that can utilize control circuit to handle, and the formation of this circuit can make when reaching predetermined dc voltage level, and generation has the voltage with dc voltage command value same level.
Recently, proposed the device of number of different types, IC is used in for example such converter circuit control, wherein controls dc voltage by the gain that is adjusted in the detector circuit.Adopting this convertor controls, can use effectively in system shown in Figure 5 with in the motor controller of IC.
Fig. 6 is the schematic diagram that expression structure shown in Figure 5 adopts the solid state circuit structure.In Fig. 6, be to realize by the software that microcomputer 70 adopts in the selector circuit shown in Fig. 5 93.In addition, be to realize in proportional component shown in Fig. 5 91 and integral element 92 by the analog circuit that adopts operational amplifier 71.Dc voltage detector circuit 96 is to be made of as shown in Figure 6 multilevel resistance circuit 72.Here, microcomputer 70 also have as shown in FIG. 1 speed detector circuit 5 and the function of speed control circuit 7.
Dc voltage control circuit shown in Fig. 2,5 and 6 is by utilizing multiplexer 95 and so on to select dc voltage command value or dc voltage detected value to carry out dc voltage control.Yet in these systems, command value or detected value are continued conversion.Therefore, at these transfer points, can produce very big dc voltage and change.
Fig. 7 represents the structure of dc voltage control circuit, and this circuit adopts one to be used to continuously change the dc voltage command calculations circuit 96 of dc voltage command value as shown in Figure 2.In addition, the dc voltage detector circuit 97 shown in Fig. 8 presentation graphs 5 is by the example of dc voltage detection and counting circuit 99.
Dc voltage command calculations circuit 90 detects duty cycle signals, and calculating can make duty ratio get the dc voltage command value of a predetermined value.On the other hand, dc voltage detects and counting circuit 99 detects duty cycle signals and calculating can make duty ratio get the dc voltage detection gain of a predetermined value, then according to detecting gain output dc voltage detected value.
By described circuit structure, dc voltage command value or dc voltage detected value become continuous output, and making can linear control to dc voltage.
Fig. 9 represents the dc voltage when adopting dc voltage control circuit shown in Fig. 7 or 8, the relation curve of duty ratio and motor voltage and resulting rotating speed.According to this system, can the Linear Control dc voltage.Therefore, can realize steady control to motor.
Because the dc voltage may command becomes and is lower than supply voltage when adopting the step-up/down chopper circuit in the converter circuit shown in Fig. 12.Rise by the slow-speed of revolution stage shown in Figure 10, can realize controlling according to big duty ratio numerical value.Thereby, even when rotating speed is low, also becomes and can realize effective Motor Control.Figure 10 represents the dc voltage when adopting the parallel operation that can freely control dc voltage, the relation curve of duty ratio and motor voltage and rotating speed.
Though the accompanying drawing of explaining control operation in being used for shown in Fig. 3,4,9 and 10 X-direction axle as mentioned above is taken as rotating speed, if the X-direction axle is taken as motor load and motor output, also can obtain similar curve.
Figure 11 represents the structure of a dc voltage control circuit.This circuit comprises the control circuit of duty ratio that is made of duty ratio command value generator circuit 80, proportional component 81 and integral element 82, is used for the linear output dc voltage command value similar to circuit shown in Fig. 7.Make duty ratio remain the dc voltage command value of constant by utilizing this control circuit of duty ratio, can calculating.Even when the dc voltage control circuit shown in employing Figure 11, also can realization and Fig. 9 and those the similar control operations shown in Figure 10.
Expression electronic structure according to another embodiment of the present invention in Figure 12 and 13 with controller.Figure 12 is the overall construction drawing of motor controller, and Figure 13 is the cut-away view of the dc voltage control circuit 11 shown in Figure 12.Present embodiment and difference embodiment illustrated in fig. 1 are dc voltage control circuit 11, are that promptly duty cycle signals and the velocity shifts signal in the speed control circuit shown in Figure 12 12 can be for selecting in dc voltage testing circuit 97.
Below with reference to Fig. 3 the operation of selection circuit 110 shown in Figure 13 is introduced.When duty ratio has reached 100% and velocity deviation when being tending towards making duty ratio further to increase, selector circuit 10 is transformed into that side that increases dc voltage with the output of dc voltage testing circuit 97.On the contrary, when duty ratio has been reduced to 60% and velocity deviation when being tending towards further reducing duty ratio, its output with dc voltage detector circuit 97 is transformed into and reduces that side of dc voltage, and therefore, motor controller of the present invention is according to Characteristics Control operation shown in Figure 3.
When adopting motor controller shown in Figure 1, because selector circuit 93 is only got the standard that duty cycle signals is selected as its, even when motor load and motor are exported under 100% or 60% duty ratio balance, it also can control dc voltage.
According to above-mentioned viewpoint, present embodiment improves.Be that it detects the signal different with duty cycle signals, so that whether detection motor load and motor output are balances, and detection speed deviation signal (appearing under the situation), so that prevent the unnecessary conversion of dc voltage value.Though what detect in this embodiment is speed deviation signal, if the poised state between another kind of signal indication motor load and the motor output then can be used this signal.
Though in this embodiment, dc voltage detector circuit 97 is suitable for selecting one of them dc voltage.But it can be suitable for providing a plurality of dc voltage command value, and selects a dc voltage command value by it.
Below with reference to Figure 14 and Figure 15 introduction according to the motor controller of an embodiment more of the present invention.Figure 14 represents to proofread and correct the motor controller of dc voltage fluctuation, and it is made of motor controller shown in Figure 1 and the voltage fluctuation correcting circuit 10 that appends on it.Figure 15 is the schematic diagram that is used to explain the control characteristic of dc voltage fluctuation corrector motor controller shown in Figure 14.
Each circuit in dc voltage shown in Figure 14 fluctuation corrector motor controller is except dc voltage fluctuation correcting circuit 10, and is identical among its work and first embodiment shown in Fig. 1.Dc voltage fluctuation correcting circuit 10 is a kind of like this circuit, it detects the part that respectively fluctuates in dc voltage, and the anti-phase fluctuation signal of the duty cycle signals that will produce in speed control circuit 7 and the fluctuation part of detection multiplies each other, and therefore produces to proofread and correct duty cycle signals.
Figure 15 represent when the duty ratio that carry out dc voltage fluctuation timing over time.In Figure 15, axis of abscissa express time, Y axis Y are represented the duty ratio of dc voltage, duty ratio and correction.The duty ratio that will be appreciated that correction be with the fluctuation of dc voltage part by anti-phase relationship change.
According to this embodiment, even there is the fluctuation part in dc voltage, Motor Control can be carried out unaffected.Yet in this system, dc voltage control circuit 9 must the controlled duty ratio that makes remain on below 100%.
Figure 16 represents the structure of motor controller of the present invention controller of air conditioner applicatory.This embodiment is a frequency conversion type air conditioner, and it detects room temperature and control room temperature and makes it to remain under the temperature of setting.
This controller of air conditioner comprises: the temperature sensor 203 that is used to detect room temperature; Temperature-control circuit 202 is used to calculate the rotary speed instruction value of compressor 200, so that the deviation of room temperature detected value and setting value at room temperature is zero; Compressor rotary speed control circuit 201, it is in response to the rotary speed instruction that is used to control compressor 200 rotating speeds; Refrigerant cycles control circuit 206, it detects the rotary speed instruction value and calculates and export the control signal that is used to control the outdoor fan 204, indoor fan 210 and the expansion valve 208 that constitute refrigerant cycles; And control circuit (outdoor ventilation amount control circuit 205, room ventilation amount control circuit 209 and expansion valve are opened control circuit 207), its response is used for controlling each component part (outdoor fan 204, indoor fan 210 and expansion valve 208) of refrigerant cycles from the control signal of refrigerant cycles controller 206.
Compressor rotary speed control circuit 201 is motor controllers, it is in response to the rotary speed instruction value from temperature-control circuit 202, be used to control the speed with the direct-coupled motor of compressor, use motor controller in the foregoing description for this motor.
Outdoor ventilation amount control circuit 205 and room ventilation amount control circuit 209 also constitute in the mode similar to the compressor rotary speed control circuit 201 in the motor controller, are directly coupled to the speed of the motor on outdoor fan and the indoor fan in order to control.Signal by 206 outputs of refrigerant cycles control circuit is the rotary speed instruction signal that is used for indoor fan and outdoor fan.
Expansion valve is opened control circuit 207 and directly is connected with expansion valve 208, it is the controller of stepping motor, be used for the aperture of variable expansion valve and produce stairstep signal, drive stepping motor whereby according to aperture signal by 206 outputs of refrigerant cycles control circuit.Expansion valve 208 is one by electric motor driven expansion valve, the aperture of this expansion valve and the proportional variation of the anglec of rotation of stepping motor.
Change the numerical value of the previous rotary speed instruction of setting in refrigerant cycles control circuit 206 according to the running status of frequency conversion type air conditioner.
By using the controller of air conditioner of this embodiment, can prevent that compressor from rotating under too high speed, and can prolong the useful life of compressor.In addition,, improved the ability of refrigeration and heating under peak efficiency, can save the required electricity charge of operation because refrigerant cycles is moved as a whole.
Figure 17 represents the structure of converter module according to an embodiment of the invention.This embodiment one is included in converter module in the module with this converter circuit 2, converter control circuit 8 and dc voltage control circuit 9 integral body introduced in first embodiment.In this module, adopt boost chopper.
Converter circuit is made of rectifier circuit 101, reactor 102, transistor 104, diode 103 and filtering capacitor 105, and wherein the semiconductor device in rectifier circuit 101, transistor 104 and the diode 105 constitutes according to module.
Converter control circuit 106 have with in 8 identical functions of the converter control circuit shown in Fig. 2.Selector circuit 108 is selected one of them dc voltage value of dc voltage testing circuit 107 according to external signal.In addition, selector circuit 110 is according to one of them the dc voltage command value in the external signal selection dc voltage instruction circuit 109.
According to present embodiment, can be easy to make the convertor device that to control dc voltage with the form of compactness.
According to motor controller of the present invention, as mentioned above, can be reduced in the loss that produces in motor, the inverter, and adopt the converter of simple structure and controller is efficiently moved.In addition, because dc voltage can change according to the rotating speed of motor, a controller just can guarantee the range of operation from the low cruise to the high-speed cruising.In other words, even for the different motor in the motor designs working point of several types, has high efficiency in the time of also utilizing a controller to control and move all the time in the working point.In addition, can be easy to proofread and correct, can realize stable electromotor velocity control for the fluctuation of dc voltage.
When this motor controller is applied to frequency conversion type air conditioner, can realizes refrigerant cycles control efficiently and can save the electricity charge.
Moreover, by will being easy to make compact motor controller in the converter circuit modularization in the motor controller of the present invention.
Claims (11)
1. motor controller comprises:
Rectifier circuit is used for AC power supplies is become the DC power supply; And filter circuit;
By the converter circuit that chopper circuit constitutes, be used for by utilizing the energy storage effect control dc voltage of switch control operation and inductance;
Motor drive is made of the inverter circuit on output that is connected to described converter circuit and the motor;
Converter control circuit is used to control the switching manipulation of described chopper circuit;
Inverter control circuit is used for the switching manipulation of the described inverter circuit of the described motor of controlling and driving;
The speed detector circuit detects the position of described motor rotor, is used to calculate the speed of described motor;
Speed control circuit receives the velocity amplitude and the speed value of described calculating, is used for by described inverter control circuit described motor being carried out speed control; And
The dc voltage control circuit receives the output signal of described speed control circuit, is used for controlling described dc voltage according to this output signal by described converter control circuit.
2. motor controller according to claim 1, wherein when the output of described speed control circuit reached predetermined value, described dc voltage control circuit was to described converter control circuit output signal, so that described dc voltage increases.
3. according to the motor controller that claim 1 connected, wherein said dc voltage control circuit is controlled described dc voltage by described converter control circuit, so that predetermined value is got in the output of described speed control circuit.
4. motor controller according to claim 1, the output of wherein said speed control circuit are the velocity amplitude of duty cycle signals or described calculating and the speed deviation signal of described speed value.
5. motor controller according to claim 1 also comprises dc voltage fluctuation correcting circuit, detects the fluctuation part of described dc voltage, is used for changing the input signal that is provided to described inverter control circuit according to this fluctuation part.
6. motor controller according to claim 1, wherein said speed control circuit are used for providing duty cycle signals to described inverter control circuit, so that velocity deviation approaches zero;
Described dc voltage control circuit receives described duty cycle signals, and it comprises: dc voltage command value generation circuit is used to produce the dc voltage command value; The dc voltage detector circuit, be used to detect and the corresponding dc voltage of the output of described converter circuit, select dc voltage command value or dc voltage detected value, make described duty cycle signals get the numerical value within preset range, produce a current instruction value, so that the deviation of dc voltage detected value and dc voltage command value approaches zero, and current instruction value is outputed to described converter circuit.
7. motor controller according to claim 6, wherein said speed control circuit are also exported described deviation and are entered into described dc voltage control circuit.
8. motor controller according to claim 6, wherein when described duty cycle signals reached the higher limit of described preset range or lower limit, described dc voltage control circuit produced current command signal, in order to increase or to reduce described dc voltage.
9. motor controller according to claim 6, also comprise dc voltage fluctuation correcting circuit, detect the fluctuation part of described voltage, by with described duty cycle signals and one and the anti-phase fluctuation signal of described fluctuation part multiply each other and produce the duty cycle signals of proofreading and correct, and this signal is input to described inverter control circuit.
10. frequency conversion type air conditioner comprises:
Rectifier circuit is used for AC power supplies is transformed to the DC power supply; And filter circuit;
Improve the converter circuit of power factor, constitute, be used for by utilizing the energy storage effect of switching manipulation and reactor, the power factor of the power supply that control dc voltage and control need improve by boost chopper;
Motor drive constitutes by being connected to the output that improves the converter circuit that described power factor uses and the inverter circuit on the motor;
Converter control circuit is used to control the switching manipulation of described boost chopper circuit;
Inverter control circuit is used for the switching manipulation of the described inverter circuit of controlling and driving motor; And
Speed control circuit, be used for by utilizing described inverter control circuit basis to control the speed of described motor from the speed value of the temperature-control circuit of described air conditioner, described frequency conversion type air conditioning machine comprises a dc voltage control circuit, it detects the output signal of described speed control circuit, being used for when described output signal reaches predetermined upper limit value is that dc voltage is risen, and dc voltage is descended.
11. frequency conversion type air conditioner according to claim 10, the output of wherein said speed control circuit is duty cycle signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95197970A CN1070657C (en) | 1995-10-06 | 1995-10-06 | Motor controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95197970A CN1070657C (en) | 1995-10-06 | 1995-10-06 | Motor controller |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01103496 Division CN1213530C (en) | 2001-02-16 | 2001-02-16 | Electric apparatus |
| CN 01103495 Division CN1317873A (en) | 2001-02-16 | 2001-02-16 | Converter module |
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| Publication Number | Publication Date |
|---|---|
| CN1200847A CN1200847A (en) | 1998-12-02 |
| CN1070657C true CN1070657C (en) | 2001-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN95197970A Expired - Fee Related CN1070657C (en) | 1995-10-06 | 1995-10-06 | Motor controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4067699A (en) * | 1999-05-31 | 2000-12-18 | Aselsan Elektronik Sanayi Ve Ticaret A.S. | Alternating current motor drive for electrical multiple units (emu) |
| DE10235162A1 (en) | 2002-08-01 | 2004-02-19 | Robert Bosch Gmbh | Controller in vehicle, especially for airbag, has converter with electrical isolation for supplying energy to components with earth connections, and data transfer coupling elements with isolation |
| US7292004B2 (en) * | 2003-04-14 | 2007-11-06 | Matsushita Electric Industrial Co., Ltd. | Motor driving apparatus |
| KR100695581B1 (en) * | 2003-04-30 | 2007-03-14 | 마츠시타 덴끼 산교 가부시키가이샤 | Motor driving apparatus, compressor, air conditioner, refrigerator, fan, electrical cleaner, electrical dryer, heat pump hot-water supplier, and hybrid automobile |
| JP2004364492A (en) * | 2003-05-09 | 2004-12-24 | Sanyo Electric Co Ltd | Motor-driving device and air-conditioning equipment |
| CN102185556A (en) * | 2011-05-10 | 2011-09-14 | 义马煤业集团股份有限公司 | Power joint control method for cage motor back-to-back frequency converter and frequency converter |
| CN104066991B (en) * | 2012-03-02 | 2016-03-30 | 松下电器产业株式会社 | The controlling method of motor compressor, control gear and refrigerated warehouse |
| CN103419597B (en) * | 2013-08-20 | 2016-02-24 | 清华大学 | For variable-frequency electric a/c system and the control method thereof of electronlmobil |
| CN104534615B (en) * | 2014-11-28 | 2017-06-09 | 广东美的制冷设备有限公司 | Motor speed adjusting method, motor speed regulating system and air-conditioner |
| JP6764255B2 (en) * | 2016-05-18 | 2020-09-30 | 株式会社マキタ | Electric work machine |
| TWI683525B (en) * | 2018-07-13 | 2020-01-21 | 茂達電子股份有限公司 | Motor driving circuit and motor driving method |
| CN109159024B (en) * | 2018-10-24 | 2023-09-08 | 浙江机电职业技术学院 | Intermediate frequency converter for high-speed electric spindle drive of internal grinding machine |
| CN113300639A (en) * | 2021-05-13 | 2021-08-24 | 中国长江电力股份有限公司 | Two-stage brushless DC motor driver and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS615563A (en) * | 1984-06-20 | 1986-01-11 | Hitachi Micro Comput Eng Ltd | Semiconductor device |
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1995
- 1995-10-06 CN CN95197970A patent/CN1070657C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS615563A (en) * | 1984-06-20 | 1986-01-11 | Hitachi Micro Comput Eng Ltd | Semiconductor device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1200847A (en) | 1998-12-02 |
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