CN111416538A - Power supply circuit with voltage-multiplying output function, motor controller and motor control method - Google Patents
Power supply circuit with voltage-multiplying output function, motor controller and motor control method Download PDFInfo
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- CN111416538A CN111416538A CN202010405023.6A CN202010405023A CN111416538A CN 111416538 A CN111416538 A CN 111416538A CN 202010405023 A CN202010405023 A CN 202010405023A CN 111416538 A CN111416538 A CN 111416538A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/40—Conversion of ac power input into dc power output without possibility of reversal by combination of static with dynamic converters; by combination of dynamo-electric with other dynamic or static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
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Abstract
The invention discloses a power supply circuit with a voltage-multiplying output function, a motor controller and a motor control method, wherein the power supply circuit comprises a full-wave rectification circuit, a voltage-multiplying circuit and an alternating-current input voltage detection circuit, when a voltage-multiplying change-over switch K1 is switched off, the waveform of a signal output end B follows the waveform of an alternating-current input end ACN to form a waveform with larger amplitude; when the voltage doubling change-over switch K1 is closed, the waveform of the signal output end B follows the waveform of the point A to form a waveform with smaller amplitude; therefore, the microprocessor can judge whether double direct current voltage output is used or not according to different detected waveforms, and simultaneously detect the value of a point B of the signal output end, so that the input alternating current voltage value is calculated proportionally, the alternating current input voltage of the voltage doubling circuit can be accurately detected, the microprocessor selects one operation parameter to control the motor to operate according to the alternating current input voltage and the working state of the voltage doubling circuit, and the motor control method is high in applicability and accurate in control.
Description
The technical field is as follows:
the invention relates to a power supply circuit with a voltage-multiplying output function, a motor controller and a motor control method.
Background art:
at present, the alternating current commercial power supply voltage in the American market is 115VAC and 230VAC, a general B L DC motor (namely a brushless direct current permanent magnet synchronous motor) or an ECM motor (an electronic commutation motor) is provided with a motor controller, a power supply circuit, a microprocessor, an IGBT inverter circuit and an interface circuit are arranged in the motor controller, and the microprocessor is connected and communicated with a control system of a client by utilizing the interface circuit.
At present, in order to meet the requirements of customers, a power supply circuit is provided with a voltage doubling circuit, so that a single-voltage direct current output and a double-voltage direct current output can be obtained, for example: when the power supply voltage of the alternating current commercial power has 115VAC, single-voltage direct current output is obtained after rectification and voltage stabilization: i.e., 163VDC output, a double voltage dc output can be obtained when the voltage doubling circuit is activated: an output of 325 VDC; when the alternating current commercial power supply voltage has 230VAC, single-voltage direct current output is obtained after rectification and voltage stabilization: i.e., 325VDC output, a double voltage dc output can be obtained when the voltage doubling circuit is activated: i.e., 650VDC output.
The microprocessor in the motor controller needs to know the ac mains supply voltage in order to select appropriate control parameters to control the operation of the motor, and therefore, an ac voltage detection circuit is generally required to know the ac mains supply voltage and then transmit information to the microprocessor.
As shown in fig. 1, the existing ac voltage detection circuits detect a stable dc voltage obtained by half-wave rectification or full-wave rectification, and then perform sampling by a voltage-dividing resistor and input to a microprocessor MCU for detection and conversion to determine the voltage value of the input ac. However, this detection method is only suitable for single voltage output, and is not suitable for a double voltage circuit, because the dc voltage value obtained by the low ac voltage passing through the voltage doubling circuit is equal to the dc voltage value obtained by the high ac voltage; such as: the input ac voltage is 230V, the rectified dc voltage is 325V, the input ac voltage is 115V, and the rectified dc voltage is 325V, and therefore, whether the input voltage is 115VAC or 230VAC cannot be accurately detected.
The voltage of the direct current bus can be reduced along with the increase of the output power, so that the voltage value of alternating current input cannot be detected in real time, the voltage of the direct current bus fluctuates along with the change of the power supply frequency, and if the average value of the DC voltage is obtained by using a common filtering mode, the input value of the AC voltage cannot be accurately obtained, so that a motor microprocessor cannot properly call motor operation parameters.
The invention content is as follows:
the invention aims to provide a power supply circuit with a voltage-multiplying output function and a motor controller applied by the power supply circuit, and mainly solves the technical problem that a microprocessor of a motor cannot properly call motor operation parameters because the microprocessor cannot accurately detect the voltage value of alternating current input under the condition that a voltage-multiplying circuit is started in the prior art.
Another object of the present invention is to provide a motor control method with a voltage doubling circuit, which is simple and reliable, and can accurately detect the voltage value of the ac input and the operating state of the voltage doubling circuit.
The purpose of the invention is realized by the following technical scheme:
power supply circuit with voltage-multiplying output function, its characterized in that: it includes:
the 1 st input pin and the 3 rd input pin of the full-wave rectifying circuit are respectively connected with the two alternating current input ends AC L and ACN so as to convert the alternating current input voltage into direct current output voltage;
the voltage doubling circuit comprises a voltage doubling change-over switch K1, a plurality of resistors and a plurality of capacitors, wherein the input end of the voltage doubling circuit is connected with the No. 2 output pin and the No. 4 output pin of the full-wave rectification circuit, and single direct-current output voltage and double direct-current output voltage are realized by opening or closing the voltage doubling change-over switch K1;
an AC input voltage detection circuit, wherein the AC input voltage detection circuit comprises a rectification voltage division circuit and a microprocessor, one contact C of a voltage doubling selector switch K1 is connected with the 3 rd input pin of the full-wave rectification circuit, and the input end of the rectification voltage division circuit is electrically connected with the contact C of a voltage doubling selector switch K1 so as to detect the opening or closing of the voltage doubling selector switch K1; the signal output end B of the rectification voltage division circuit is connected with the input end of the microprocessor;
when the voltage-multiplying change-over switch K1 is switched off, the waveform of the signal output end B follows the waveform of the AC input end ACN to form a waveform with larger amplitude; when the voltage doubling selector switch K1 is closed, the waveform of the signal output end B forms a waveform with smaller amplitude; therefore, the microprocessor can judge whether double direct current voltage output is used or not according to different detected waveforms, and simultaneously detect the voltage value of a point B of the signal output end, thereby calculating the input alternating current voltage value in proportion.
The voltage doubling circuit comprises a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2 and a voltage doubling change-over switch K1, wherein two ends of the first resistor R1 and the second resistor R2 are connected in series and then are respectively connected to a 2 nd output pin and a 4 th output pin of the full-wave rectification circuit, and two ends of the first capacitor C1 and the second capacitor C2 are respectively connected to a 2 nd output pin and a 4 th output pin of the full-wave rectification circuit after being connected in series; the point a between the first capacitor C1 and the second capacitor C2 is connected to the other contact D of the voltage-doubling switch K1.
The rectifying voltage-dividing circuit comprises a rectifying diode D1 and a plurality of voltage-dividing resistors which are connected in series, the input end of the rectifying voltage-dividing circuit is electrically connected with a contact C of a voltage-multiplying switch K1, the other end of the rectifying voltage-dividing circuit is connected with a grounding end GND, a signal output end B is led out from between two of the voltage-dividing resistors, and the signal output end B is connected with the input end of the microprocessor.
The voltage dividing resistors comprise a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6, and the signal output end B is led out from the space between the third resistor R3 and the fourth resistor R4.
The voltage value of the signal output end B is read once every time period T1 to be sampled, N times of continuous reading are performed, where N is an integer, the sampled data of N times are sorted, the voltage values of the maximum two times are averaged to be used as the peak value of the ac input voltage, and then the peak value is converted into the ac input voltage.
The period of the ac input voltage is T0, and then N periods T1 cover the period of the ac input power.
The utility model provides a motor controller, includes power supply circuit, IGBT inverter circuit, memory, its characterized in that: the power supply circuit is the power supply circuit with the voltage-multiplying output function, the microprocessor outputs signals to control the IGBT inverter circuit to work, the memory stores various operation parameters which respectively correspond to various different alternating current input voltages and the working states of the voltage-multiplying circuits, and the microprocessor selects one operation parameter to control the motor to operate according to the alternating current input voltages and the working states of the voltage-multiplying circuits.
The utility model provides a motor control method, including the motor controller, this motor controller includes full wave rectifier circuit, voltage doubling circuit, alternating current input voltage detection circuit, wherein alternating current input voltage detection circuit includes rectification bleeder circuit and microprocessor, the voltage doubling change-over switch K1's of voltage doubling circuit contact C is connected to rectification bleeder circuit's input electricity, rectification bleeder circuit's signal output part B connects microprocessor's input, microprocessor output signal control IGBT inverter circuit work, the memory storage has the operating condition that multiple operating parameter corresponds multiple different alternating current input voltage and voltage doubling circuit respectively, its characterized in that:
the method comprises the following steps: the microprocessor judges the working state of the voltage doubling circuit according to different waveforms of the signal output end B, namely whether the voltage doubling circuit is used or not;
step two: detecting the voltage value of a point B of the signal output end, and calculating an alternating current input voltage value in proportion;
step three: the microprocessor selects an operation parameter to control the motor to operate according to the calculated AC input voltage and the working state of the voltage doubling circuit.
The microprocessor in the first step determines the working state of the voltage doubling circuit according to different waveforms of the signal output end B, and means that: when the voltage-multiplying change-over switch K1 is switched off, the waveform of the signal output end B follows the waveform of the AC input end ACN to form a waveform with larger amplitude; when the voltage doubling selector switch K1 is closed, the waveform of the signal output end B forms a waveform with smaller amplitude; therefore, the microprocessor can judge the working state of the voltage doubling circuit according to different detected waveforms, namely whether the voltage doubling circuit is used or whether double direct current voltage is output.
The detecting the voltage value of the point B of the signal output end in the second step, so as to calculate the ac input voltage value proportionally, means that the voltage value of the signal output end B is read once every time period T1 to be sampled, N times of continuous reading are performed, N times of sampling data are sorted, the voltage values of the maximum two times are averaged to be used as the peak value of the ac input voltage, and then the peak value is converted into the ac input voltage value through proportion, so as to accurately detect the ac input voltage of the full-wave rectifier circuit.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the power supply circuit with the voltage-multiplying output function, when the voltage-multiplying change-over switch K1 is switched off, the waveform of the signal output end B follows the waveform of the AC input end ACN to form a waveform with a large amplitude; when the voltage doubling change-over switch K1 is closed, the waveform of the signal output end B follows the waveform of the point A to form a waveform with smaller amplitude; therefore, the microprocessor can judge whether double direct current voltage output is used or not according to different detected waveforms, and simultaneously detect the value of a point B of the signal output end, so that the input alternating current voltage value is calculated proportionally, the alternating current input voltage of the voltage doubling circuit can be accurately detected, the microprocessor selects one operation parameter to control the motor to operate according to the alternating current input voltage and the working state of the voltage doubling circuit, and the motor control method is high in applicability and accurate in control.
2. Other advantages of the present invention are described in more detail in the specification.
Description of the drawings:
FIG. 1 is a schematic circuit diagram of a prior art power supply circuit with voltage doubling output;
FIG. 2 is a schematic circuit diagram of the power supply circuit with voltage doubling output of the present invention;
FIG. 3 is a schematic flow diagram of the present invention;
fig. 4 is a waveform diagram of the signal output terminal B when the voltage-doubling changeover switch K1 of the present invention is turned off;
fig. 5 is a waveform diagram of the signal output terminal B when the voltage-doubling changeover switch K1 of the present invention is closed;
fig. 6 is a block schematic diagram of a second embodiment of the present invention.
The specific implementation mode is as follows:
the present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 2, the present invention is a power supply circuit with voltage-doubling output function, which is characterized in that: it includes:
the 1 st input pin and the 3 rd input pin of the full-wave rectifying circuit are respectively connected with the two alternating current input ends AC L and ACN so as to convert the alternating current input voltage into direct current output voltage;
the voltage doubling circuit comprises a voltage doubling change-over switch K1, a plurality of resistors and a plurality of capacitors, wherein the input end of the voltage doubling circuit is connected with the No. 2 output pin and the No. 4 output pin of the full-wave rectification circuit, and single direct-current output voltage and double direct-current output voltage are realized by opening or closing the voltage doubling change-over switch K1;
an AC input voltage detection circuit, wherein the AC input voltage detection circuit comprises a rectification voltage division circuit and a microprocessor, one contact C of a voltage doubling selector switch K1 is connected with the 3 rd input pin of the full-wave rectification circuit, and the input end of the rectification voltage division circuit is electrically connected with the contact C of a voltage doubling selector switch K1 so as to detect the opening or closing of the voltage doubling selector switch K1; the signal output end B of the rectification voltage division circuit is connected with the input end of the microprocessor;
as shown in fig. 4, when the voltage-doubling switch K1 is turned off, the waveform of the signal output terminal B follows the waveform of the ac input terminal ACN, forming a waveform with a large amplitude; as shown in fig. 5, when the voltage doubling changeover switch K1 is closed, the waveform of the signal output terminal B follows the waveform of the point a, forming a waveform with a smaller amplitude; therefore, the microprocessor can judge whether double direct current voltage output is used or not according to different detected waveforms, and simultaneously detects the value of a point B of the signal output end, so that the input alternating current voltage value is calculated proportionally, the alternating current input voltage of the voltage doubling circuit can be accurately detected, the microprocessor selects one operation parameter to control the motor to operate according to the alternating current input voltage and the working state of the voltage doubling circuit, and the applicability is high.
The voltage doubling circuit comprises a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2 and a voltage doubling change-over switch K1, wherein two ends of the first resistor R1 and the second resistor R2 are connected in series and then are respectively connected to a 2 nd output pin and a 4 th output pin of the full-wave rectification circuit, and two ends of the first capacitor C1 and the second capacitor C2 are respectively connected to a 2 nd output pin and a 4 th output pin of the full-wave rectification circuit after being connected in series; the point a between the first capacitor C1 and the second capacitor C2 is connected to the other contact D of the voltage-doubling switch K1.
The rectifying voltage-dividing circuit comprises a rectifying diode D1 and a plurality of voltage-dividing resistors which are connected in series, the input end of the rectifying voltage-dividing circuit is electrically connected with a contact C of a voltage-multiplying switch K1, the other end of the rectifying voltage-dividing circuit is connected with a grounding end GND, a signal output end B is led out from between two of the voltage-dividing resistors, and the signal output end B is connected with the input end of the microprocessor. The circuit structure is simple, practical and convenient.
The voltage dividing resistors comprise a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6, and the signal output end B is led out from the space between the third resistor R3 and the fourth resistor R4.
The voltage value of the signal output end B is read once every time period T1 to be sampled, N times of continuous reading are performed, where N is an integer, the sampled data of N times are sorted, the voltage values of the maximum two times are averaged to be used as the peak value of the ac input voltage, and then the peak value is converted into the ac input voltage value.
For example, the voltage value is sampled every 500us, N times are continuously read, as shown in fig. 3, for example, N is 38 times, the time covers the period of the ac power supply, the 38 times of sampled data are sorted, the maximum two times of voltage value average Vav is (V [ ] max + V [ ] max1)/2, V [ ] max and V [ ] max1 are the maximum value and the sub-maximum value after array sorting, and are used as the peak value of the ac input voltage, and then converted into the actual value of the ac input voltage, as shown in the flowchart of fig. 3, the specific conversion is calculated according to the state of the voltage doubling switch K1, and the calculated ac input voltage value is definitely deviated from the actual input value by using a common conversion formula, but the deviation is acceptable within a certain range, for example, 20%. Thus, the detection accuracy is high.
The period of the ac input voltage is T0, and then N periods T1 cover the period of the ac input power. For example, if the ac input voltage is 115VAC and the frequency thereof is 50HZ, one waveform period T0 is 0.02s (sec), the voltage value is sampled every 500us in one period, and N is set to 38 times, which can substantially cover the period of the ac input power source.
According to the power supply circuit with the voltage-multiplying output function, when the voltage-multiplying change-over switch K1 is switched off, the waveform of the signal output end B follows the waveform of the AC input end ACN to form a waveform with a large amplitude; when the voltage doubling change-over switch K1 is closed, the waveform of the signal output end B follows the waveform of the point A to form a waveform with smaller amplitude; therefore, the microprocessor can judge whether double direct current voltage output is used or not according to different detected waveforms, and simultaneously detect the value of a point B of the signal output end, so that the input alternating current voltage value is calculated proportionally, the alternating current input voltage of the voltage doubling circuit can be accurately detected, the microprocessor selects one operation parameter to control the motor to operate according to the alternating current input voltage and the working state of the voltage doubling circuit, and the motor control method is high in applicability and accurate in control.
Example two:
as shown in fig. 6, a B L DC motor comprises a motor body and a motor controller, wherein the motor body comprises a motor shell, a stator assembly and a rotor assembly;
the motor controller comprises a control circuit board, wherein the control circuit board comprises a rectifying circuit, a voltage doubling circuit, a rectifying and voltage dividing circuit, a microprocessor, an IGBT (insulated gate bipolar transistor) inverter circuit, a rotor position detection unit and a multi-gear control interface module; the rotor position detection unit sends rotor position information to the microprocessor, the microprocessor outputs signals to control the IGBT inverter circuit to work, the output end of the GBT inverter circuit is electrically connected with a coil winding of the stator, the storage stores various operating parameters which respectively correspond to various different alternating current input voltages and the working states of the voltage doubling circuit, the microprocessor selects one operating parameter to control the motor to operate according to the alternating current input voltages and the working states of the voltage doubling circuit, and the normal operation of the motor can be ensured through the power supply circuit with the voltage doubling output function.
The power supply circuit with the voltage-multiplying output function in the first embodiment is composed of a rectifying circuit, a voltage-multiplying circuit, a rectifying voltage-dividing circuit and a microprocessor.
Examples are: assuming that the memory stores a plurality of operating parameters corresponding to a plurality of different ac input voltages and operating states of the voltage doubling circuit, as shown in table 1, the multi-gear control interface module is connected with 5 gears, which are N1, N2, N3, N4 and N5, wherein only one gear is selected, the selected gear is input to the microprocessor through the multi-gear control interface module, and the microprocessor selects one operating parameter of the motor to control the operation of the motor according to the selected gear, the ac input voltage and the operating state of the voltage doubling circuit.
TABLE 1
When the K1 is disconnected, the AC input voltage is 115VAC, and the input gear N3 is effective, the microprocessor calls the data in the table 1 in the memory, and the rotating speed is selected to be 700RPM, namely 700 revolutions per minute to control the motor to operate; when the K1 is closed, the AC input voltage is 230VAC, and the input gear N5 is valid, the microprocessor calls the data in the table 1 in the memory, and selects the rotating speed of 1500RPM, namely 1500RPM to control the motor to operate.
Of course, the operation parameter stored in the memory may be a rotation speed parameter, a torque parameter or an air volume parameter. The microprocessor can judge whether double direct current voltage output is used or not according to different detected waveforms, and simultaneously detects the value of a point B at the signal output end, so that the input alternating current voltage value is calculated proportionally, the alternating current input voltage of the voltage doubling circuit can be accurately detected, the microprocessor selects one operation parameter to control the motor to operate according to the alternating current input voltage and the working state of the voltage doubling circuit, and the microprocessor has strong applicability and accurate control.
Example three:
as shown in fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, a motor control method includes a motor controller, the motor controller includes a full-wave rectification circuit, a voltage doubling circuit, and an ac input voltage detection circuit, wherein the ac input voltage detection circuit includes a rectification voltage division circuit and a microprocessor, an input end of the rectification voltage division circuit is electrically connected to a contact C of a voltage doubling switch K1 of the voltage doubling circuit, a signal output end B of the rectification voltage division circuit is connected to an input end of the microprocessor, the microprocessor outputs a signal to control an IGBT inverter circuit to operate, and a memory stores a plurality of operation parameters corresponding to a plurality of different ac input voltages and operating states of the voltage doubling circuit, respectively, and is characterized in that:
the method comprises the following steps: the microprocessor judges the working state of the voltage doubling circuit according to different waveforms of the signal output end B, namely whether the voltage doubling circuit is used or not;
step two: detecting the voltage value of a point B of the signal output end, and calculating an alternating current input voltage value in proportion;
step three: the microprocessor selects an operation parameter to control the motor to operate according to the calculated AC input voltage and the working state of the voltage doubling circuit.
The microprocessor in the first step determines the working state of the voltage doubling circuit according to different waveforms of the signal output end B, and means that: when the voltage-multiplying change-over switch K1 is switched off, the waveform of the signal output end B follows the waveform of the AC input end ACN to form a waveform with larger amplitude; when the voltage doubling selector switch K1 is closed, the waveform of the signal output end B forms a waveform with smaller amplitude; therefore, the microprocessor can judge the working state of the voltage doubling circuit according to different detected waveforms, namely whether the voltage doubling circuit is used or whether double direct current voltage is output.
The detecting the voltage value of the point B of the signal output end in the second step, so as to calculate the ac input voltage value proportionally, means that the voltage value of the signal output end B is read once every time period T1 to be sampled, N times of continuous reading are performed, N times of sampling data are sorted, the voltage values of the maximum two times are averaged to be used as the peak value of the ac input voltage, and then the peak value is converted into the ac input voltage value through proportion, so as to accurately detect the ac input voltage of the full-wave rectifier circuit.
The control method is simple and reliable, and can accurately detect the voltage value of the alternating current input and the working state of the voltage doubling circuit.
The above embodiments are only preferred embodiments of the present invention, but the present invention is not limited thereto, and any other changes, modifications, substitutions, combinations, simplifications, which are made without departing from the spirit and principle of the present invention, are all equivalent replacements within the protection scope of the present invention.
Claims (10)
1. Power supply circuit with voltage-multiplying output function, its characterized in that: it includes:
the 1 st input pin and the 3 rd input pin of the full-wave rectifying circuit are respectively connected with the two alternating current input ends AC L and ACN so as to convert the alternating current input voltage into direct current output voltage;
the voltage doubling circuit comprises a voltage doubling change-over switch K1, a plurality of resistors and a plurality of capacitors, wherein the input end of the voltage doubling circuit is connected with the No. 2 output pin and the No. 4 output pin of the full-wave rectification circuit, and single direct-current output voltage and double direct-current output voltage are realized by opening or closing the voltage doubling change-over switch K1;
an AC input voltage detection circuit, wherein the AC input voltage detection circuit comprises a rectification voltage division circuit and a microprocessor, one contact C of a voltage doubling selector switch K1 is connected with the 3 rd input pin of the full-wave rectification circuit, and the input end of the rectification voltage division circuit is electrically connected with the contact C of a voltage doubling selector switch K1 so as to detect the opening or closing of the voltage doubling selector switch K1; the signal output end B of the rectification voltage division circuit is connected with the input end of the microprocessor;
when the voltage-multiplying change-over switch K1 is switched off, the waveform of the signal output end B follows the waveform of the AC input end ACN to form a waveform with larger amplitude; when the voltage doubling selector switch K1 is closed, the waveform of the signal output end B forms a waveform with smaller amplitude; therefore, the microprocessor can judge whether double direct current voltage output is used or not according to different detected waveforms, and simultaneously detect the voltage value of a point B of the signal output end, thereby calculating the input alternating current voltage value in proportion.
2. A power supply circuit with voltage-doubling output function according to claim 1, characterized in that: the voltage doubling circuit comprises a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2 and a voltage doubling change-over switch K1, wherein two ends of the first resistor R1 and the second resistor R2 are connected in series and then are respectively connected to a 2 nd output pin and a 4 th output pin of the full-wave rectification circuit, and two ends of the first capacitor C1 and the second capacitor C2 are respectively connected to a 2 nd output pin and a 4 th output pin of the full-wave rectification circuit after being connected in series; the point a between the first capacitor C1 and the second capacitor C2 is connected to the other contact D of the voltage-doubling switch K1.
3. A power supply circuit with voltage-doubling output function according to claim 1 or 2, characterized in that: the rectification bleeder circuit comprises a rectification diode D1 and a plurality of bleeder resistors which are connected in series, the input end of the rectification bleeder circuit is electrically connected with a contact C of a voltage-multiplying switch K1, the other end of the rectification bleeder circuit is connected with a grounding end GND, a signal output end B is led out from between the two bleeder resistors, and the signal output end B is connected with the input end of the microprocessor.
4. A power supply circuit with voltage-doubling output function according to claim 3, characterized in that: the plurality of voltage division resistors comprise a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6, and a signal output end B is led out from the space between the third resistor R3 and the fourth resistor R4.
5. The power supply circuit with voltage-doubling output function according to claim 1, 2, 3 or 4, characterized in that: the voltage value of the signal output end B is read once every time period T1 for sampling, N times are continuously read, the sampled data of the N times are sequenced, the voltage values of the maximum two times are averaged to be used as the peak value of the AC input voltage, and then the peak value is converted into the AC input voltage value.
6. The power supply circuit with voltage-doubling output function of claim 5, wherein: the period of the ac input voltage is T0, and then N periods T1 cover the period of the ac input power.
7. The utility model provides a motor controller, includes power supply circuit, IGBT inverter circuit, memory, its characterized in that: the power supply circuit is the power supply circuit with the voltage-multiplying output function as claimed in any one of claims 1 to 6, the microprocessor outputs signals to control the operation of the IGBT inverter circuit, the memory stores a plurality of operation parameters respectively corresponding to a plurality of different alternating-current input voltages and the operating states of the voltage-multiplying circuit, and the microprocessor selects one operation parameter to control the operation of the motor according to the alternating-current input voltages and the operating states of the voltage-multiplying circuit.
8. The utility model provides a motor control method, including the motor controller, this motor controller includes full wave rectifier circuit, voltage doubling circuit, alternating current input voltage detection circuit, wherein alternating current input voltage detection circuit includes rectification bleeder circuit and microprocessor, the voltage doubling change-over switch K1's of voltage doubling circuit contact C is connected to rectification bleeder circuit's input electricity, rectification bleeder circuit's signal output part B connects microprocessor's input, microprocessor output signal control IGBT inverter circuit work, the memory storage has the operating condition that multiple operating parameter corresponds multiple different alternating current input voltage and voltage doubling circuit respectively, its characterized in that:
the method comprises the following steps: the microprocessor judges the working state of the voltage doubling circuit according to different waveforms of the signal output end B, namely whether the voltage doubling circuit is used or not;
step two: detecting the voltage value of a point B of the signal output end, and calculating an alternating current input voltage value in proportion;
step three: the microprocessor selects an operation parameter to control the motor to operate according to the calculated AC input voltage and the working state of the voltage doubling circuit.
9. A motor control method according to claim 8, wherein: step one, the microprocessor judges the working state of the voltage doubling circuit according to different waveforms of the signal output end B, which means that: when the voltage-multiplying change-over switch K1 is switched off, the waveform of the signal output end B follows the waveform of the AC input end ACN to form a waveform with larger amplitude; when the voltage doubling selector switch K1 is closed, the waveform of the signal output end B forms a waveform with smaller amplitude; therefore, the microprocessor can judge the working state of the voltage doubling circuit according to different detected waveforms, namely whether the voltage doubling circuit is used or whether double direct current voltage is output.
10. A motor control method according to claim 8 or 9, characterized in that: and step two, detecting the voltage value of the point B of the signal output end, calculating the alternating current input voltage value according to a proportion, namely reading the voltage value of the signal output end B once every time period T1 for sampling, continuously reading N times, wherein N is an integer, sequencing the sampled data of the N times, averaging the voltage values of the maximum two times, taking the average voltage value as the peak value of the alternating current input voltage, and converting the peak value into the alternating current input voltage value through proportion, thereby accurately detecting the alternating current input voltage of the full-wave rectification circuit.
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