Toshiba VF-A7 Dynamic regenerative braking To urgently stop the motor,  ～ Ω

6.13.4 Dynamic (regenerative) braking - To urgently stop the motor

 ：Dynamic braking mode selection

 ：Dynamic braking resistance

 ：Dynamic braking resistor capacity

・Function

Dynamic braking is used in the following cases:

1)need to stop the motor quickly.

2)The inverter trips because of an over-voltage (OP) during deceleration.

3)Fluctuation of load condition causes a regenerative power even at a constant speed such as press machine.

[Parameter	setting]
Title	Function	Adjustment range	Default setting
		: Disabled
	Dynamic braking mode selection	: Enabled/overload	Model
		detection enabled
			dependent
	Dynamic braking resistance	～ [Ω]
	Dynamic braking resistor capacity	～ [kW]
※Default settings vary from model dependent. Refer to 6.13.4-4).

Protection level is defined by (Refer to 6.13.5).

Note 1) While dynamic braking is in operation, “P” blink is displayed at left side of the monitor. (It is not an error.) The blink starts at achieving (over-voltage stall protection level / dynamic braking protection level).

Note 2) In the case of oscillating of monitor or taking long time at deceleration, set (over-voltage stall protection) = .

Note 3) When using braking unit(PB3), set (dynamic braking mode selection) = , and (over-voltage stall protection) = .

Note 4) Dynamic braking operates even if the ST-CC terminal is opened.

1) An internal braking resistor (for 3.7kW model and smaller)

Note)

	ＭＣＣＢ	ＰＡ１ ＰＢ１ ＰＲ１
				Motor
	Ｒ		Ｕ
Power	Ｓ	Internal brakingＶ		ＩＭ
supply	Ｔ	resistor	Ｗ

Inverter

Ｇ/Ｅ

Note) The internal braking resistor is already connected to terminals PA1 and PB1 (so that the internal resistor is ready for use). When the internal braking resistor is not used, change its connection from PB1 to PR1, and also change the setting of the dynamic braking-related parameter. See 2) on the next page for the connection.

[Parameter	setting]
Title	Function	Adjustment range	Setting value
	Dynamic braking	: Disabled	
	mode selection	: Enabled/overload detection enabled

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