HPtec SD4030B3 User Manual

8
8.Setting of switch SW 3(MIX)
Four types of setting are possible with the switch for adjusting Mix Decay function.
Mix Decay function has effect of reducing vibration of a motor by controlling slope of electric current
attenuation within a PWM cycle. Since the optimum ratio of Slow Decay setting at each motor rotation speed
is different, it is recommended that a customer may select the optimum switch position while checking
vibration at the motor speed you need.
In general, vibration declines when a Slow Decay ratio is larger at ultra-low speed area. On the other hand,
vibration declines when set a Slow Decay ratio smaller at a faster rotation speed.
SW setting
Slow Decay ratio
Motor rotation speed
80%
Slower
Faster
40%
20%
0%
PWM波形
電流波形
T1 T2
T3
T1 : スローディケイ
T2： ファーストディケイ
T3： 減衰周期
スローディケイ比率 = T1 / T3 ×100 （％）
ON ON
ON OFF
OFF ON
OFF OFF
Current waveform
PWM waveform
1 2
ON
1 2
ON
1 2
ON
1 2
ON
T1 : Slow Decay
T2 : Fast Decay
T3 : Decay Cycle
Slow Decay Ratio = T1 /T3 x 100 (%)

HPtec SD4030B3 Specifications

General

Brand	HPtec
Model	SD4030B3
Category	Control Unit
Language	English