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Chapter 1 Description
1.1 Introduction
The MiniAx BRUSHLESS is a very small bi-directional, four quadrant drive.
the output power stage (MOSFET) is controlled using the PWM technique with 22 Khz modulation frequency
which allows it to drive small to medium sized brushless servomotors (up to 2Nm) where dynamic
performance and noticeable rotation regularity is required.
MiniAx, is a drive with a one source power range of 20-80 Vdc along with a differential type reference input.
Drive enable is furnished through continuous voltage between +10Vdc/30Vdc. It is also possible to enable
through GND connection.
The velocity feedback may be through:
-Hall sensor + encoder.
-Internal PWM (Armature), + Hall sensor.
Exist the possibility to change any default setting of parameters just substituting existing components with
different value.
The selection of various prearranged values setting is easily realized by opening and closing solder points.
The intervention of drive protections are all visible with LEDs on the front of the drive.
5-10A 10-20A
The nominal current, as well as peak current is adjusted through resistance on the base pcb. The drive
dimensions are 135,5x82x 28,5mm. Listed below are the 2 principle sizes of the MiniAx product line:
The operating temperature is from 0 to 40 °C (32° to 104°F) and no ventilating system is required as long as
the spacing between the drives allow for adequate air flow.
1.2 Technical data
Input voltage Range 20-80 Vdc
Output voltage max. 0,93 V input
PWM frequency 22 kHz
Operating Temperature 0/40 C°
Storage Temperature -10/70 C°
Drift +/-18 uV/C°
Analogue input +/-10 Vdc
Current monitor +/-7 Vdc=Pk. curr.
Encoder and Hall Effect +5 Vdc max130 mA
Auxilary power supply +/-10 Vdc max 4mA
Max. Encoder frequency 250 kHz
Logic signals +10/30 Vdc **
Band Width of current loop 2.5 kHz
Humidity 10/95 % w/o
No condensation
Weight 350 gr.
Altitude 2000 m.slm
** The MiniAx can also be setted in negative logic.
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