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HT Series

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The HT is the first model of high torque brushless 3-phase DC motor. SMAC currently offers the HT035 series, with 35 mm diameter and HT055 series, with 55 mm diameter.
Features
  • A combination of SMAC’s patent pending Halbach magnets and printed coil technology
  • Printed coil allows coil shapes impossible to achieve with conventional windings.
  • Rotary encoder 2K or 24K optional
  • Gear ratio 4:1 or 16:1 optional (Other ratio available upon request.)
  • Competitive pricing

Model 

HT035

HT055

Apply Voltage [VDC]

48

48

Power [W]

26

37.8

Terminal Resistance (phase to phase) [Ohm]

13.4

8.3

Efficiency, maximum [%]

72.7

85

No-load speed [RPM]

2388

851

No-load current [A]

0.08

0.36

Stall torque [mNm]

497

1995

Stall current [A]

3.5

6

Friction torque (static) [mNm]

10.1

 

Friction torque (dynamic) [mNm]

6.6

 

Speed constant [RPM/V]

66.2

 

Back-EMF constant [V/RPM]

14.7

50.4

Torque constant [mNm]

141.6

333

Current constant [A/mNm]

0.02

 

speed of n-M-curve (speed/Torque gradient) [RPM/mNm]

4.85

0.34

Terminal inductance (phase to phase) [mH]

1.7

4.5

Mechanical time constant [ms]

12

3.3

Rotor inertia [grcm2]

136

940

Angular acceleration [10x3 rod/s2]

28.3

 

Thermal resistance (winding to housing) [K/W]

1.9

0.36

Thermal resistance (housing to ambient) [K/W]

10.4

6.4

Thermal time constant (housing) ms [s]

1390

 

Thermal time constant (coil) ms [s]

33

 

Motor type

Brushless

Brushless

Pole pair

6

6

Rotor mass [gr]

146

350

Total mass [gr]

250

980

Encoder Option

2K or 24K

2K or 24K

Gearbox Option

4:1 or 16:1

4:1 or 16:1

Controller Option

Built-in Servo Controller

Built-in Servo Controller


 

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