Valve Actuators, Light displays, Textile machinery, Medical equipment, Air conditioning & refrigeration, Dampers peristaltic Pumps, Dosing pumps, Vending machines, CCTV Camera positioning, any positioning Application.


MTR4a is a 24V AC Synchronous Motor with a power 3.1W, speed 250 rpm and torque 3.6 Ncm.  It is a reversing synchronous motor of the permanent magnet type with two stator windings, for single-phase AC 50/60 Hz. Phase displacement of the excitation current is achieved by connecting a capacitor in parallel with one of the stator windings.

The sense of rotation is determined by the resulting circular rotating field. Electrical reversal of the sense of rotation is effected by means of a single-pole changeover switch. The 24 pole rotor which has a steel shaft polished to a mirror finish rotates in sintered bronze bearings. The motor can be provided with a Mounting plate/Screw clip for fixing. These motors can combined with Spur Gearboxes as per requirement. 

Standard Data
Motor type   Reversible synchronous
Ambient temperature operation ºC -15 to +55
Ambient temperature  storage ºC -20 to +100
Thermal class ºC 105
Electrical Enclosure IP 40
Connections   Flexible Leads 22 AWG, 200mm length; ends stripped 10 mm
Sense of rotation   Indicated by lead colour (red-CW & black ACW)
Life expectancy   3 years in continuous operation
Mounting   Any position
HVT    As per standard IEC60034-1
Weight  g 200
Rotor stalling   The motor can be stopped when voltage is applied, without being overheated
Rotor shaft   Hardened steel, ground & polished
Bearings   Sintered bronze, self-lubricating (Ball bearing on request)
External dimensions   Dia 51.5 x 28.5 mm

Technical Data
Standard Motor Voltages (VN) V 24 48 110 230
Operation capacitor (50 Hz) CN µF/VAC 10/50 2.2/100 0.39/250 0.1/400
Operation capacitor (60Hz) CN µF/VAC 8.2/50 1.8/100 0.33/250 0.082/400
Lead colour (VN)   Blue Brown White Yellow
Tolerance of Voltage % -10 to +15% of the rated voltage
Duty Cycle % 100
Rated Frequency Hz 50 60
Power output at rated voltage W 0.94 1.03
Speed Rpm 250 300
Running Torque at rated voltage Ncm 3.6 3.3
Power Consumption at rated voltage      W 4 3.2
Detent Torque Ncm 0.45

Dimensional Drawing

Dimensional Drawing of Mechtex Synchronous Motor - MTR4a

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