Yaskawa Matrix Converter - Manual (Page 21)

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MxC Introduction
‹ Introducing the MxC
The design of the MxC is simpler and more efficient than a conventional inverter. The MxC uses a different
mechanism to generate AC voltage, and relies on nine bi-directional switches to adjust AC output power to the
motor directly from an AC line power input.
The MxC has no rectifying diodes and no DC bus capacitors commonly used in inverters.
New Type: Varispeed AC (uses the MxC circuit, with no external devices)
Conventional Type: Requires a regenerative resistor discharging system and two external devices
Conventional Type: Harmonic filter and power regeneration system with two external devices
: Bi-directional
switches
Built-in AC filter
Regenerated
power
Electric
power
Regenerated
power
Electric
power
Power
Input current,
low harmonics
MxC
Motor
Reactor
Input current,
high harmonics
Braking resistor:
Emits regenerated power as heat
Regenerated
power
Braking unit
PWM inverter
Regenerated
power
Regenerated
power
Electric
power
Electric power
Power Motor
PWM inverter PWM converter
AC filter
Regenerated
power
Electric
power
Regenerated
power
Electric
power
Power
Input current,
low harmonics
Motor