Hitachi X200 Series instruction manual Basic System Description, Inverter

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Basic System Description

A motor control system will obviously include a motor and inverter, as well as a breaker or fuses for safety. If you are connecting a motor to the inverter on a test bench just to get started, that’s all you may need for now. But a system can also have a variety of additional components. Some can be for noise suppression, while others may enhance the inverter’s braking performance. The figure and table below show a system with all the optional components you may need in your finished application.

From power supply

Breaker,

MCCB or

GFI

L1 L2 L3

+1

Inverter

+

GND

T1 T2 T3

Motor

Thermal switch

Name	Function
Breaker /	A molded-case circuit breaker (MCCB), ground fault
disconnect	interrupter (GFI), or a fused disconnect device. NOTE:
	The installer must refer to the NEC and local codes to
	ensure safety and compliance.
Input-side	This is useful in suppressing harmonics induced on the
AC Reactor	power supply lines and for improving the power factor.
	WARNING: Some applications must use an input-side
	AC Reactor to prevent inverter damage. See Warning on
	next page.
Radio noise	Electrical noise interference may occur on nearby
filter	equipment such as a radio receiver. This magnetic choke
	filter helps reduce radiated noise (can also be used on
	output).
EMI filter (for	Reduces the conducted noise on the power supply wiring
CE applications,	between the inverter and the power distribution system.
see Appendix D)	Connect to the inverter primary (input) side.
	EU version (with a suffix of -FEF have integrated EMC
	Filter, which is category C1 for 200V class and C2 for
	400V class.)
Radio noise	This capacitive filter reduces radiated noise from the
filter (use in	main power wires in the inverter input side.
non-CE
applications)
DC link choke	Suppress harmonics generated by the inverter.
	However, it will not protect the input diode bridge
	rectifier.
Radio noise	Electrical noise interference may occur on nearby
filter	equipment such as a radio receiver. This magnetic choke
	filter helps reduce radiated noise (can also be used on
	input).
Output-side	This reactor reduces the vibration in the motor caused
AC Reactor	by the inverter’s switching waveforms, by smoothing the
	waveform to approximate commercial power quality. It
	is also useful to reduce harmonics when wiring from the
	inverter to the motor is more than 10m in length.
LCR filter	Sine wave shaping filter for output side.

Inverter Mounting and installation

NOTE: Note that some components are required for regulatory agency compliance (see Chapter 5 and Appendix D).