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.
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