JPS5549997A - Motor drive system using pulse width modulation inverter - Google Patents
Motor drive system using pulse width modulation inverterInfo
- Publication number
- JPS5549997A JPS5549997A JP12273278A JP12273278A JPS5549997A JP S5549997 A JPS5549997 A JP S5549997A JP 12273278 A JP12273278 A JP 12273278A JP 12273278 A JP12273278 A JP 12273278A JP S5549997 A JPS5549997 A JP S5549997A
- Authority
- JP
- Japan
- Prior art keywords
- waves
- motor
- generating circuit
- frequency
- sine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To improve the drive characteristics of a motor, by driving the motor by artificial sine wave voltage in not only a region not higher than base speed but also a region not lower than the base speed.
CONSTITUTION: An AC motor 33 is driven through an inverter circuit consisting of the circuits of the switching elements 21∼26 and rectifiers 27∼32 of transistors, etc. connected to a direct current power source 34. The output of a signal generating circuit composed of a sine wave generating circuit 35, in which frequency and amplitude can be changed, a saw tooth wave generating circuit 8, whose waves have frequency obtained by multiplying the frequency f of sine waves by K, comparators 9∼11 and reversers 12∼14 is applied to the bases of the transistors 21∼ 26. Output PWM waves maintain periodicity because the number of the waves of saw tooth waves corresponding to a half-period of sine waves is integers, and there is no danger that the unevenness is produced in the torque of the motor 33.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12273278A JPS5549997A (en) | 1978-10-06 | 1978-10-06 | Motor drive system using pulse width modulation inverter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12273278A JPS5549997A (en) | 1978-10-06 | 1978-10-06 | Motor drive system using pulse width modulation inverter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5549997A true JPS5549997A (en) | 1980-04-11 |
Family
ID=14843207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12273278A Pending JPS5549997A (en) | 1978-10-06 | 1978-10-06 | Motor drive system using pulse width modulation inverter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5549997A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4995135A (en) * | 1973-01-17 | 1974-09-10 | ||
JPS52154020A (en) * | 1976-06-17 | 1977-12-21 | Mitsubishi Electric Corp | Control system for induction motor by plurality of pulse duration modulated variable frequency inverter |
-
1978
- 1978-10-06 JP JP12273278A patent/JPS5549997A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4995135A (en) * | 1973-01-17 | 1974-09-10 | ||
JPS52154020A (en) * | 1976-06-17 | 1977-12-21 | Mitsubishi Electric Corp | Control system for induction motor by plurality of pulse duration modulated variable frequency inverter |
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