4.31
EDH0162En1040 – 06/99
MM4005
Motion Control Tutorial
Fig. 4.47
— Motor Pulse with High Voltage Chopper.
Once the desired current value is reached, a chopper circuit activates to
keep the current close to the nominal value.
The MM4005 uses two implementations of this circuit for two different dri-
ver card families. One of them, called MM16PP, is designed for small vari-
able-reluctance motors and offers full- and half-stepping capabilities. It can
drive the following motors:
Motor
Mode
Current
Voltage
(A)
(V)
UE16PP
Half-step
0.2
30
UE31PP
Full-step
0.4
30
The other type of driver card is the MM78PP. It is designed to drive four
phase permanent magnet motors using a x10 mini-stepping technique. The
different configurations are for the following motors:
Motor
Mode
Current
Voltage
(A)
(V)
UE41PP
x10 mini-step
0.8
30
UE62PP
x10 mini-step
1.6
60
UE63PP
x10 mini-step
2.2
60
4.7.2
DC Motor Drivers
There are three major categories of DC motor drivers. The simplest one is a
voltage amplifier (Fig. 4.48).
Fig. 4.48
— DC Motor Voltage Amplifier.
M
E
Vn
Control Signal
±
10 V
Phase ON
Nominal Current
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