YASKAWA SGMAH Series 200V AC SERVO MOTOR Industrial Servo Motor
SGMAH-A5A1A21
Specifications
Model SGMAH-A5A1A21
Product Type AC Servo Motor
Rated Output 50w
Rated Torque0.159 Nm
Rated Speed 3000RPM
Power Supply Voltage 200vAC
Rated Current 0.64Amps
OTHER SUPERIOR PRODUCTS
Yasakawa Motor, Driver SG- Mitsubishi Motor HC-,HA-
Westinghouse Modules 1C-,5X- Emerson VE-,KJ-
Honeywell TC-,TK- Fanuc motor A0-
Rosemount transmitter 3051- Yokogawa transmitter EJA-
Contact person: Anna
E-mail: wisdomlongkeji@163.com
Cellphone: +0086-13534205279
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Reduced Voltage Starting of Motors
Reduced Voltage Starting connects the motor windings/terminals at
lower than normal line voltage during the initial starting period
to reduce the inrush current when the motor starts.
• Reduced voltage starting may be required when:
The current in-rush form the motor starting adversely affects the
voltage drop on the electrical system.needed to reduce the
mechanical “starting shock” on drive-lines and equipment when the
motor starts.
• Reducing the voltage reduces the current in-rush to the motor and
also reduces the starting torque available when the motor starts.
• All NEMA induction motors can will accept reduced voltage
starting however it may not provide enough starting torque in some
situations to drive certain specific loads.
If the driven load or the power distribution system cannot accept a
full voltage start, some type of reduced voltage or "soft" starting
scheme must be used.
• Typical reduced voltage starter types include:
1. Solid State (Electronic) Starters
2. Primary Resistance Starters
3. Autotransformer Starters
4. Part Winding Starters
5. Wye-Delta Starters
Reduced voltage starters can only be used where low starting torque
is acceptable or a means exists to remove the load from the motor
or application before it is stopped.
Stepper motors can often exhibit a phenomena refered to as
resonance at certain step rates. This can be seen as a sudden loss
or drop in torque at certain speeds which can result in missed
steps or loss of synchronism. It occurs when the input step pulse
rate coincides with the natural oscillation frequency of the rotor.
Often there is a resonance area around the 100 – 200 pps region and
also one in the high step pulse rate region. The resonance
phenomena of a stepper motor comes from its basic construction and
therefore
it is not possible to eliminate it completely. It is also dependent
upon the load conditions. It can be reduced
by driving the motor in half or microstepping modes.
When one step pulse is applied to a stepper motor the rotor behaves
in a manner as defined by the above curve.
The step time t is the time it takes the motor shaft to rotate one
step angle once the first step pulse is applied.
This step time is highly dependent on the ratio of torque to
inertia (load) as well as the type of driver used.
Since the torque is a function of the displacement it follows that
the acceleration will also be. Therefore, when moving in large step
increments a high torque is developed and consequently a high
acceleration. This can cause overshots and ringing as shown. The
settling time T is the time it takes these oscillations or ringing
to cease. In certain applications this phenomena can be
undesirable. It is possible to reduce or eliminate this behaviour
by microstepping the stepper motor. For more information on
microstepping please consult the microstepping note.