Multiple-frequency inversion method and control apparatus for internal combustion engine driven generator
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02M-005/44
H02M-009/04
F02N-011/04
출원번호
US-0005281
(2012-03-01)
등록번호
US-8712666
(2014-04-29)
우선권정보
CN-2011 1 0060848 (2011-03-15)
국제출원번호
PCT/CN2012/071832
(2012-03-01)
§371/§102 date
20130916
(20130916)
국제공개번호
WO2012/122895
(2012-09-20)
발명자
/ 주소
Long, Yu
Tian, Hui
출원인 / 주소
Loncin Motor Co., Ltd.
대리인 / 주소
Fraser Clemens Martin & Miller LLC
인용정보
피인용 횟수 :
1인용 특허 :
3
초록▼
A multiple-frequency inversion method and a control apparatus for an internal combustion engine driven generator includes an inverter unit that employs a multiple-frequency inversion technology, controlling the inverter unit through a low switching frequency f to obtain a 2f modulated frequency, thu
A multiple-frequency inversion method and a control apparatus for an internal combustion engine driven generator includes an inverter unit that employs a multiple-frequency inversion technology, controlling the inverter unit through a low switching frequency f to obtain a 2f modulated frequency, thus resolving the problem that a low frequency switching component generates a high frequency modulated waveform. Four switching devices in the inverter unit have the same working frequency, alleviating the controller load. In addition, a high modulated frequency reduces the device parameters of the filter unit, resulting in a smaller-sized and lighter apparatus, thus giving the generator portability. Reduction of the device parameters of the filter unit means reduction of the output internal resistance of the generator, therefore increasing the non-linear load capability of the generator.
대표청구항▼
1. A multiple-frequency inversion apparatus for an internal combustion engine driven generator, wherein it comprises: an output voltage rectifying unit configured to rectify the output voltage of a filter unit;an output voltage analog-to-digital conversion unit configured to perform analog-to-digita
1. A multiple-frequency inversion apparatus for an internal combustion engine driven generator, wherein it comprises: an output voltage rectifying unit configured to rectify the output voltage of a filter unit;an output voltage analog-to-digital conversion unit configured to perform analog-to-digital conversion for the rectified output voltage;an output voltage calculating unit configured to calculate the average value of the output voltage or the effective value of the output voltage according to the output voltage having undergone the analog-to-digital conversion;a comparing unit configured to compare the average value of the output voltage with a target voltage value or compare the effective value of the output voltage with a target voltage value;a control unit configured to, according to the comparison results, adjust the proportionality coefficient of two sine with a 180-degree phase difference in a table of sine until the average value or the effective value of the output voltage falls within a preset range of the target voltage value; the table of sine is used for generating two sine waves with a 180-degree phase difference, and the two sine waves with a 180-degree phase difference are compared with a triangle wave to generate four PWM waves which have pulse frequency f, and the triangle wave has a frequency f; the four PWM waves which have frequency f drive switching tubes in an inverter unit to enable the inverter unit to output modulated wave with a pulse frequency 2f. 2. The multiple-frequency inversion apparatus for an internal combustion engine driven generator according to claim 1, wherein it further comprises: a positive amplitude conversion unit configured to perform positive amplitude conversion for the output current of the filter unit;a subtracting unit configured to subtract a reference value from the output current having undergone the positive amplitude conversion;an output current analog-to-digital conversion configured to perform analog-to-digital conversion for the output current with the reference value subtracted;an output current effective value calculating unit configured to calculate the effective value of the output current according to the output current having undergone the analog-to-digital conversion;a target revolving speed looking up unit configured to, according to the effective value of the output current, look up a preset revolving speed-current curve to obtain a corresponding target revolving speed;a throttle opening degree control unit configured to control the opening degree of the throttle of the internal combustion engine so that the revolving speed of the internal combustion engine reaches the target revolving speed. 3. The multiple-frequency inversion apparatus for an internal combustion engine driven generator according to claim 2, wherein the filter unit is a LC low-pass filter. 4. The multiple-frequency inversion apparatus for an internal combustion engine driven generator according to claim 1, wherein the filter unit is a LC low-pass filter. 5. A multiple-frequency inversion method for an internal combustion engine driven generator, wherein it comprises: rectifying the output voltage of a filter unit;after performing analog-to-digital conversion for the rectified output voltage, calculating the average value of the output voltage or the effective value of the output voltage;comparing the average value of the output voltage with a target voltage value or comparing the effective value of the output voltage with a target voltage value;according to the comparison results, adjusting the proportionality coefficient of two sine with a 180-degree phase difference in a table of sine until the average value or the effective value of the output voltage falls within a preset range of the target voltage value; the table of sine is used for generating two sine waves with a 180-degree phase difference, and the two sine waves with a 180-degree phase difference are compared with a triangle wave to generate four PWM waves which have pulse frequency f, and the triangle wave has a frequency f; the four PWM waves which have frequency f drive switching tubes in an inverter unit to enable the inverter unit to output modulated wave with a pulse frequency 2f. 6. The multiple-frequency inversion method for an internal combustion engine driven generator according to claim 5, wherein it further comprises: performing positive amplitude conversion for the output current of the filter unit acquired by a current acquisition transformer;subtracting a reference value from the output current having undergone the positive amplitude conversion;performing analog-to-digital conversion for the output current with the reference value subtracted and then calculating the effective value of the output current;according to the effective value of the output current, looking up a preset revolving speed-current curve to obtain a corresponding target revolving speed;controlling the opening degree of the throttle of the internal combustion engine so that the revolving speed of the internal combustion engine reaches the target revolving speed. 7. The multiple-frequency inversion method for an internal combustion engine driven generator according to claim 6, wherein the filter unit is a LC low-pass filter. 8. The multiple-frequency inversion method for an internal combustion engine driven generator according to claim 5, wherein the filter unit is a LC low-pass filter. 9. A control apparatus for an internal combustion engine driven generator, configured to control the internal combustion engine driven generator, wherein the internal combustion engine, which functions as a prime motor, drives the generator to generate electricity, and an alternating current outputted by the generator is rectified into a direct current by a rectifying unit, and the direct current is outputted to an inverter unit subsequently; controlled by a controller, the inverter unit inverts the direct current into a required alternating current which is provided to a load after being filtered by a filter unit; the controller controls the opening degree of the throttle of the internal combustion engine through a throttle controller so as to control the output current; the controller controls the states of switching tubes of the inverter unit through PWM wave, wherein the apparatus comprises: an output voltage calculating unit configured to rectify the output voltage of the filter unit over again, after performing analog-to-digital conversion for the rectified output voltage, calculate the average value or the effective value of the output voltage;a comparing unit configured to compare the average value of the output voltage with a target value thereof or compare the effective value of the output voltage with a target value thereof;a control unit configured to, according to the comparison results, adjust the proportionality coefficient of two sine with a 180-degree phase difference in a table of sine until the average value or the effective value of the output voltage falls within a preset range of the target voltage value; the table of sine is used for generating two sine waves with a 180-degree phase difference, and the two sine waves with a 180-degree phase difference are compared with a triangle wave to generate four PWM waves which have pulse frequency f, and the triangle wave has a frequency f; the four PWM waves which have frequency f drive switching tubes in an inverter unit to enable the inverter unit to output modulated wave with a pulse frequency 2f. 10. The control apparatus for an internal combustion engine driven generator according to claim 9, wherein the apparatus further comprises: an output current effective value calculating unit configured to, after performing analog-to-digital conversion for the output current of the filter unit acquired by a current acquisition transformer, calculate the effective value of the output current;a target revolving speed looking up unit configured to, according to the effective value of the output current, look up a preset revolving speed-current curve to obtain a corresponding target revolving speed;a throttle opening degree control unit configured to control the opening degree of the throttle of the internal combustion engine so that the revolving speed of the internal combustion engine reaches the target revolving speed to control the output current. 11. The control apparatus for an internal combustion engine driven generator according to claim 10, wherein the filter unit is a LC low-pass filter. 12. The control apparatus for an internal combustion engine driven generator according to claim 8, wherein the filter unit is a LC low-pass filter. 13. A control method for an internal combustion engine driven generator, wherein, the internal combustion engine, which functions as a prime motor, drives the generator to generate electricity, and an alternating current outputted by the generator is rectified into a direct current by a rectifying unit, and the direct current is outputted to an inverter unit subsequently; controlled by a controller, the inverter unit inverts the direct current into a required alternating current which is provided to a load after being filtered by a filter unit; the controller controls the opening degree of the throttle of the internal combustion engine through a throttle controller so as to control the output current; the controller controls the states of switching tubes of the inverter unit through PWM wave, wherein the method further comprises: rectifying the output voltage of the filter unit over again, after performing analog-to-digital conversion for the rectified output voltage, calculating the average value or the effective value of the output voltage;comparing the average value of the output voltage with a target value thereof or comparing the effective value of the output voltage with a target voltage value thereof;according to the comparison results, adjusting the proportionality coefficient of two sine with a 180-degree phase difference in a table of sine until the average value or the effective value of the output voltage falls within a preset range of the target voltage value; the table of sine is used for generating two sine waves with a 180-degree phase difference, and the two sine waves with a 180-degree phase difference are compared with a triangle wave to generate four PWM waves which have pulse frequency f, and the triangle wave has a frequency f; the four PWM waves which have frequency f drive switching tubes in an inverter unit to enable the inverter unit to output modulated wave with a pulse frequency 2f. 14. The control method for an internal combustion engine driven generator according to claim 13, wherein the method further comprises: performing analog-to-digital conversion for the output current of the filter unit acquired by a current acquisition transformer and then calculating the effective value of the output current;according to the effective value of the output current, looking up a preset revolving speed-current curve to obtain a corresponding target revolving speed;controlling the opening degree of the throttle of the internal combustion engine so that the revolving speed of the internal combustion engine reaches the target revolving speed so as to control the output current. 15. The control method for an internal combustion engine driven generator according to claim 14, wherein the filter unit is a LC low-pass filter. 16. The control method for an internal combustion engine driven generator according to claim 13, wherein the filter unit is a LC low-pass filter.
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이 특허에 인용된 특허 (3)
Tanamachi Tokunosuke (Katsuta ; JPX) Narita Hiroshi (Katsuta ; JPX) Ibamoto Masahiko (Katsuta ; JPX) Okamatsu Shigetoshi (Katsuta ; JPX), Control of induction motor using PWM inverter.
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