VisSim/Digital Power Supply Designer™
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Anthony Boon - Senior Design Engineer
CEG Elettronica
Digital Power Supply Designer
The VisSim/Digital Power Supply Designer includes simulation and auto code generation of the following common power supply components and controls:
Power Converters
Boost, bridgeless PFC, buck, buck-boost, Cuk, flyback, forward, full-bridge PFC, half-bridge PFC, multi-phase buck, push-pull, Sepic, Zeta
Features
- Switching converter models
- Converters can be modeled as synchronous or nonsynchronous
- Inductor saturation can be included in models
- Multi-phase converter models
- Multiple outputs on isolated converters
- Switching converter models allow analysis of the effects of regulation resolution errors due to the ADC sampling instant
Sources
AC source, DC source, dual PWM, single-phase rectifier, three-phase AC source, three-phase rectifier (C2000 based)
Features
- Sources include large variety of options and nonlinear effects
- Dual PWM is based on the C2000 ePWM so that diagrams can be created for control loops and verified using the emulated PWM
- Rectifiers can be used together with the boost (or other) converter models to create PFC diagrams
Sensors
AC current transformer, ADC, analog comparator, DAC, event capture, isolated current sensor (Hall-effect), isolated voltage sensor, resistor (current sense), resistive divider (voltage sense)
Features
- Models of various voltage and current sensors in the control loop simulation
- Emulates various MCU functions for digital control loop simulations
- Simulates and visualizes ADC and DAC quantization effects
Compensators and Filters
3p3z, anti-aliasing filter, moving average filter, PI, PID (traditional), PID (2p2z), Types I, II and III
Features
- Performs control loop simulations and experiment with various types of compensators
- Performs control loop simulations and easily change between analog and digital compensators
- Digital compensators are modelled in floating or fixed point
- Simulates time delays, quantization, ZOH, and saturation effects
Controllers
Average current mode controller, bridgeless PFC, hysteretic current mode controller, multi-phase voltage mode controller, peak current mode controller, power factor controller, PSFB controller, voltage mode controller, zero-transition current mode controller (boundary mode)
Features
- Built-in controllers to simulate and experiment with various control strategies
- Quickly change from analog to digital controllers
- Simulate and visualize effects of digital controllers such as PWM resolution and limit cycling
- Custom controllers can be easily developed in VisSim
Loads
Constant-current load, constant-power load, load profile
Tools - coefficient conversion
Calculates compensator analog s-coefficients, poles and zeros and digital z-coefficients to provide a starting point for power converter compensator designs
Features
- Easily convert analog compensators and filter designs to a digital algorithm by automatically generating the z-coefficients
- Enter in the analog component values, converter power stage values or directly the compensator poles and zeros to generate the z-coefficients for a digital compensator or filter