Different performance characteristics can be created without the expense of creating a newly designed motor solution for each variation.  The TG2300 Series motors offer a wide range of stator, rotor and mount options, including:

1. Two coil options are available with a “Y” and a “Delta wiring of the stator
2. Four rotor options are available with the rotor outside diameter from 2.24” to 2.625” 
3. Three different standard mountings: M1 (minimum size round), M2, (NEMA 23 compatible) and the M3
4. Part Sets are available with all offerings of coils and rotor combinations
5. Hall Effect Sensors are standard with thermistor for monitoring of stator temperature
6. The TG2300-ENC is specifically designed for servo applications
7. All ThinGap motors may be used as generators.  For example, the TG2310 specified as a generator becomes the TG2310-GEN 

A Motor Calculator is available to open and use to determine the speed-torque curve for the various motor options.  Enter the desired operating voltage to determine the operating curve for each of the motor offerings. Examine the curves to determine the best fit for your speed and torque requirements.

Stators

The stator is available with internal wiring for either WYE or Delta configurations.  Generally, the WYE winding offers a higher Torque Constant than the Delta. The WYE is used in higher torque or higher voltage applications.  Typically, Delta is used in lower voltage or higher speed applications.

The TG23X0 is the WYE with the 23X1 as the Delta Stator designator.

Rotors

1. Less than 8,000RPM – the 231X utilizes permanent magnets mounted internal to the stator with 2.240” OD.
2. Low Voltage or High Speeds – the 232X rotor utilizes light magnets mounted outside the stator.
3. Higher Torque and Speeds – the 233X rotor utilizes heavier magnets mounted outside the stator.
4. Maximum Torque - the 234X rotor utilizes magnets mounted both inside and outside the stator.

Mounts

Three mounting options are available, including:

1. M1 – aluminum round minimum size open frame mount with a 0.875” registration ring
2. M2 – NEMA 23 compatible (Nema 23 bolt pattern), featuring an open aluminum frame with a 1.498” registration ring
3. M3 – larger round mount allowing a motor with 231X or 232X stator and rotors to beenclosed.  May be used with the 233X and 234X assemblies but without the cover.
4. TG 231x Mounting Options
5. TG 232x Mounting Options
6. TG 233x Mounting Options
7. TG 234x Mounting Options

Part Sets

All components designated for integration with OEM products are available as part sets. Mounting / assembly technology can be provided minimizing the duplication of mechanics.

Temperature Sensing

A thermistor mounted adjacent to the stator windings monitors the stator temperature.  In effect, the use of a reverse coefficient thermistor allows the user to monitor the motor core’s operating temperature.  Refer to thermistor data. Download the Thermistor Temperature Graph.

Motor Test Data

The test curve data reported for each motor is labeled “System Performance” because it includes controller, as well as motor losses.

The test data is obtained by measuring total input power to the amplifier using a trapezoidal PWM amplifier at maximum duty cycle.  Continuous power output is measured based on dynamometer output of speed x torque.  Continuous power output is determined using the thermistor of the stator indicating 100-degrees Celsius.   (Refer to footnotes on each data sheet).

Magnets

ThinGap Standard Motors use Neodymium (Neo or NIB) magnets. 
Neo magnets lose field strength as operating temperatures rise. To prevent permanent loss of field strength , the stator temperature should not exceed 100-degrees Celsius.

Controllers and Amplifiers

ThinGap TG2300 series motors operate with a range of amplifiers available from such vendors as AMC, Copley, Elmo, and many others.  Many OEM customers utilize in-house designed specialized amplifiers based on Motorola, International Rectifier or other commercially available microprocessors.

Ironless core motors feature low inductance that must be considered when specifying a drive system.  Inductance is necessary for proper operation of PWM amplifiers where switching currents can create leading edge spikes.  Some amplifiers have short circuit protection, which requires drive inductance to separate the drive current rise time from a true short circuit.  Sample inductor boards are available from ThinGap, which can be connected in series with motor phase leads.

Trapezoidal waveform PWM drives  are commonplace in the controller marketplace and works well with ThinGap motors.  18kHz PWM frequency or higher is recommended. Refer to the manufacturers specifications for minimum inductance requirements.

Sinusoidal waveform PWM drives perform very well with ThinGap motors because the ThinGap back EMF waveform is almost purely sinusoidal.  Coupling a sinusoidal drive to a sinusoidal back EMF motor, such as ThinGap, results in very low torque ripple. See Torque Ripple Brief.

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