PWM power supply with constant RMS output voltage control
US6411072B1 · kind B1 · utility
40Cited by
7References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 17, 2001 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Apr 17, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F5/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A control system and method for supplying a constant RMS voltage to a load includes a outer control loop for monitoring a characteristic variable of the system and an inner control loop for maintaining the power delivered to the load as a function of the received input power. A pulse width modulator (PWM) coupled to both control loops delivers pulses representative of an unregulated input voltage duty cycle. The inner control loop compares the duty cycle representation of the input voltage with a duty cycle representation of the pulse and generates a control signal to the PWM accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.