Efficient Networks S120 manual DC braking as fault response, QB6WDUW

Basic functions

6.8 Armature short-circuit brake, internal voltage protection, DC brake

the drive then returns to controlled mode. If the "flying restart" function is not active, the drive can only be restarted from standstill without overcurrent fault.

●In V/f mode:

With the "flying restart" function activated, the converter frequency is synchronized with the motor frequency, and the drive will then return to V/f mode. If

the "flying restart" function is not available, the drive can only be restarted from standstill without overcurrent fault.

DC braking as fault response

If the DC brake is activated as a fault response, the motor is initially braked in field-oriented mode along the braking ramp up to the threshold set in p1234. The slope of the ramp is identical with that of the OFF1 ramp (parameterized using p1082, p1121). Subsequently, the pulses are disabled for the motor demagnetizing time p0347 in order to demagnetize the motor. The DC braking will start for the duration set in p1233.

If an encoder is used, braking will continue until the speed falls below the standstill threshold p1226.

If no encoder is used, only the period in p1233 will be applied.

<1>			p0115
'&%5.,B%UDNH		'&%5.WLPH	'&%5.QB6WDUW
0...10000 [A]		0...3600 [s]	20...210000 [1/min]
p1232[M]	(0)	p1233[M] (0)	p1234[M] (0)

				%,&2		&XUUHQWDFWXDOYDOXHV	,BDFWDEVYDO
			%,&2 			[5730]	r0068[0]
				3XOVHLQKLELW
			QBDFW			[6714]
		$6&&RQILJ	QBVHW
		0... 3
		p1231[M] (0)					7KHSDUDPHWHUVRIWKH,BPD[FXUUHQWFRQWUROOHUDUHXVHG
	$6&DFW
	p1230[C]					7RSXOVHLQKLELW	,BPD[B8BFWUO.S	,BPD[B8BFWUO7Q
		4					0.000...100000.000	0.000...50.000 [s]
	(0)				t	7RVHTXHQFHU
2))				p0347		'&EUDNHUHDG\	p1345[D] (0.000)	p1346D] (0.030)
		0					<6>	<6>
						r1239.10
			_,BVHW_					8BRXWSXW

					Kp	Tn	r0072
	p1232				–
				_,BVHW_
	<2>	_,BDFW_		)URP,WFRQWUROOHU[8014]	0,1		7RFRQWUROOHU	[5730][6730]
	0RWWBGHPDJQHWL]H		t				7R9IFKDUDFWHULVWLF [6300]
	0...20 [s]
	p0347[M] (0)
		%UDNHUHVSRQVH			,BFWUO.S	,BFWUO7Q
	QBDFW
		3XOVHLQKLELW			0.000...100000.000 [V/A]	0.00...1000.00 [ms]
	QBVHW				p1715[D] (0.000)	p1717[D] (2.00)
	p1234				<5>	<5>
)DXOWUHVSRQVH'&EUDNH				<4>
				'&EUDNHDFWLYH
			t	r1239.8
	_,BVHW_	p0347
		<3>
	p1232
		_,BDFW_
		p1233	t
!7KHEUDNLQJFXUUHQWRIWKH'&EUDNHLVGHWHUPLQHGLQWKHDXWRPDWLFFDOFXODWLRQS				
!7KHGHPDJQHWL]DWLRQWLPHLVGHWHUPLQHGLQWKHDXWRPDWLFFDOFXODWLRQS			
!:KHQWKHVWDQGVWLOOWKUHVKROGSLVUHDFKHGWKH'&FXUUHQWLQMHFWLRQLVFDQFHOHGSUHPDWXUHO\
!7KHUVLJQDOLVVHWZKHQWKH'&EUDNHLVDFWLYH
!)RU6(592RQO\
!)RU9(&725RQO\
Figure 6-5	DC brake

196	Drive Functions
	Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4