The Motor converts electrical energy into mechanical energy (rotational motion) and losses
are converted into heat energy. Since, these are compact motors and have less surface area
which is required for cooling, they tend to heat more. The temperature of 30°C ~ 40°C above
ambient is ok. i.e. If ambient temperature is 40°C, then motor temperature of 70°C is
normal. The temperature of motor of continuous duty stabilizes after around one hour of
working.
In case of doubt, please check current drawn by the motor. It should be less than or equal
to the Rated Current.
The Motor converts electrical energy into mechanical energy (rotational motion) and losses
are converted into heat energy. Since, these are compact motors and have less surface area
which is required for cooling, they tend to heat more.
Even if no load is attached to the motor, it consumes certain minimum current which is
almost fully converted to heat energy. Hence the motor gets heated.
In case of doubt, please check current drawn by the motor. It should be less than or equal
to the Rated Current.
The torque produced by the motor is affected by changes in power supply voltage. The torque
produced by the motor is proportional to roughly the square of the power supply voltage. For
example, if the voltage of a motor rated at 230 V fluctuates between 207 V (90%) and 253 V
(110%), the torque produced will vary between 80% and 120%. When using motors under large
power voltage fluctuations, remember that the torque produced will vary, so select a motor
that provides a sufficient margin.
A reversible motor is not simply an induction motor with a simple braking mechanism added.
The ratio of coils between the primary and the secondary coils in a reversible motor is
different from that of an induction motor. The simple brake mechanism is added to the rear
of the motor.
The capacitor's capacitance is also increased to increase the starting torque. This means
that if only the brake mechanism is removed, the reversible motor will not be usable at a
continuous rating like an induction motor; it will simply lose its holding power and its
reversing characteristics will be reduced.- A reversible motor is not simply an induction
motor with a simple braking mechanism added. The ratio of coils between the primary and the
secondary coils in a reversible motor is different from that of an induction motor. The
simple brake mechanism is added to the rear of the motor. The capacitor's capacitance is
also increased to increase the starting torque. This means that if only the brake mechanism
is removed, the reversible motor will not be usable at a continuous rating like an induction
motor; it will simply lose its holding power and its reversing characteristics will be
reduced.
Reversible motors require a larger input power than induction motors to increase the
starting torque and improve the instant reversing characteristics. This means that loss is
high and the temperature rises more during continuous operation. If operated continuously,
the motor will burn out. It is thus designed to provide maximum performance if operation is
restricted to less than 30 minutes continuously.
The speed of single phase (AC) induction motors / reversible motors is determined by the
power supply frequency. To change the speed of induction / reversible motors, the power
supply frequency needs to be changed.
If your application requires changing speed, we
recommend a speed control motor.
Yes, capacitor is necessary for a single phase Induction Motor.
Almost all of Swipfe standard compact AC motors that fall within the broad group of
single-phase induction motors are "capacitor-start-capacitor-run-motors". To run an
induction motor, a rotational magnetic field must be created. Capacitors perform the role of
creating a power supply with the phase shift that is required for creating such a rotational
magnetic field. Three-phase motors, by contrast, always supply power with different phases,
so they do not require capacitors.
The capacitor that comes with the motor has a capacitance that is selected to work optimally
with the motor. When another capacitor is used, it should be a motor capacitor with the same
capacitance and rated voltage as the capacitor that comes with the motor.
Gearheads reduce the motor speed by 3 ~ 180. Reduction may be in a single stage or multiple
stages. The number of speed reductions stages depends on the gear ratio, so the direction of
output shaft rotation differs.
Extreme changes in temperature may lead to condensation within the motor. Should this occur,
parts may rust, greatly shortening the service life. Take measures to prevent condensation.
A gearhead with a gear ratio of 180 must be connected to two decimal gearheads with a gear
ratio of 10. The permissible torque is the same as if the 180 gearhead were used alone. The
mounting screws must also be longer.
Swipfe lubricates the surface of gears in gearheads with grease. Lubrication is not
required.
Swipfe Induction / Reversible / EM Brake Motor are basically Squirrel Cage Induction Motors,
having 2 poles or 4 poles. The approx. no load speed of 4 pole motor is 1440 RPM at 50Hz
frequency. As the load increases the speed drops and current increases. Manufacturers
mention speed at rated torque or rated power or at no load etc. Hence the speeds for 4 pole
motors are specified as 1250, 1320, 1350 or 1440 RPM etc. There is no difference in these
motors. The same applies to 2 pole motors etc.
Similarly, the current of these motors increases as the load increases. If the load is less
than the rated load, the current is lesser than mentioned in specifications. If the load is
more than the rated power, the current drawn is more than the rated current.
The performance and specifications vary depending upon the design, materials used, machining
accuracies, winding techniques etc. by the manufactures.
Swipfe mentions the Rated Power, Rated Speed, Rated Current at Rated Supply at 50Hz
frequency.
When instant forward/reverse operation is controlled with an SSR, the SSR characteristics
can cause shorts in the circuit. Time must be allowed between switching form the SSR for
clockwise rotation to the SSR for counterclockwise rotation.
- Three points should be kept in mind when using a fan for ventilation and cooling:
Do not increase ventilation resistance
Ensure that the air inside the machinery is not stagnant
Do not create any shortcuts for air to pass through, the ideal fan position is where air
flows in one direction, without interference. If these conditions are met, there is no
fundamental difference between forced ventilation and blow ventilation, but exhaust is more
effective in maintaining a stable internal temperature.
The stator is totally burnt due to overheating. It happens when the rotating motor shaft is
locked due to load beyond its capacity but supply continues and current flows into the
motor.
Consequently, a large current flows heating up the motor and burning of stator.
When the motor is locked, there is sudden increase in current. It is necessary that you
install a protective device like over current protector, to switch off the supply
immediately after Motor gets locked.
This is not a manufacturing defect but an improper application or installation of motor.
The Electromagnetic Brake Motors are fitted with Fail safe (Power Activated) EM Brake at the
back. The brake operates only when power is supplied to it and releases the shaft for
rotation. The power supply is given to motor and brake simultaneously.
The brake at the back of EM Brake Motor has two supply options, 24 Volt DC or 230 Volt AC.
Brake coil requires DC supply to operate. In case of 24 Volt DC rated coils, direct DC
supply can be connected to operate it.
However, for 230 Volt AC rated coils, half wave rectifier is connected in between the supply
and brake coil. The half wave rectifier converts AC supply into DC and then only the brake
operates.