RPX40 Brushless DC Motor
RapidPower™ Xtreme Series

RPX40 Brushless DC Motor

Summary Details

Size: 40 mm (1.575 in)
Peak Torque: to 991 mNm (140 oz.in)
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Complete Motion Solution

For a complete motion solution, the RPX40 is compatible with ElectroCraft's Universal and PRO Series drives.

High torque density. Excellent torque per frame size performance.

New from ElectroCraft, the RPX40 is a highly dynamic and controllable very small frame metric motor. With an advanced 14-pole encapsulated core, this compact DC motor offers high torque density at a very affordable price. The RPX40 is available in 12V, 24V and 48V versions and like all ElectroCraft motors is fully customizable. This versatile motor is highly energy efficient and ideal for embedded applications.

All versions of the RPX40 include hall sensor feedback and can be configured with an optional encoder (differential, optical encoder with up to 2048 lines).

RPX Model Number Legend

Additional Product Details

Outline Drawing

Technical Drawings

Specifications & Winding Data

RPX40 Stack Size and Winding Models
Specifications RPX40-125V12 RPX40-125V24 RPX40-125V48 RPX40-250V12 RPX40-250V24 RPX40-250V48 RPX40-325V12 RPX40-325V24 RPX40-325V48
Design Voltage (VDC) 12 24 48 12 24 48 12 24 48
No load speed (RPM) 6,000 5,000 3,600
Peak Torque (oz-in) 56.4 108.1 140.0
Peak Torque (mNm) 398.0 763.0 991.0
Peak Current (Amps) 19.7 9.8 4.9 33.3 16.7 8.3 31.0 15.5 7.7
Continuous Stall Torque* (oz-in) 17.7 35.4 46.0
Continuous Stall Torque* (mNm) 125.0 250.0 325.0
Continuous Stall Current (Amps) 6.6 3.3 1.6 10.9 5.5 2.7 10.2 5.1 2.6
Continuous Rated Torque* (oz-in) 15.3 22.0 38.2
Continuous Rated Torque* (mNm) 108.0 155.0 270.0
Continuous Rated Current (Amps) 5.7 2.8 1.4 6.8 3.4 1.7 8.5 4.2 2.1
Continuous Rated Speed (RPM) 4,775 4,075 2,950
Voltage Constant (V / kRPM) 2.0 4.0 8.0 2.4 4.8 9.6 3.3 6.7 13.3
Torque Constant (oz-in / Amp) 2.7 5.4 10.8 3.2 6.5 13.0 4.5 9.0 18.0
Torque Constant (mNm / Amp) 19.1 38.1 76.3 22.9 45.8 91.5 31.8 63.6 127.1
Resistance (Ohms) 0.4 1.5 5.8 0.3 1.1 4.5 0.2 0.7 2.7
Inductance (mH) 0.043 0.170 0.680 0.028 0.125 0.501 0.031 0.125 0.500
Motor Constant (oz-in / √ Watt) 4.5 7.7 9.8
Motor Constant (mNm / √ Watt) 31.6 54.2 69.2
Electrical Constant (msec) 0.33 0.40 0.45
Mechanical Constant (msec) 1.11 0.51 0.19
Thermal Time Constant (sec) 430.0 455.0 480.0
Rotor inertia (oz-in²) 0.0383 0.0820 0.1640
Rotor inertia (g-cm²) 7.0 15.0 30.0
Thermal Resistance (C / Watt) 4.77 4.02 3.69
Axial Load (N) 5mm from face 7.0 7.0 7.0
Radial Load (N) 5mm from face 30.0 30.0 30.0
Weight (oz) 5.6 8.5 13.1
Weight (g) 160.00 240.00 370.00
Length (inch) 1.2 1.6 2.4
Length (mm) 30.0 40.0 60.0
Number of Poles 14.0 14.0 14.0
Notes:  *Continuous rating based on a 25°C ambient temperature, winding temperature rise of 125°C. Mounted on a 150 X 150 X 6 mm aluminum heat sink.

Performance Curves

Chart Chart Chart Chart: RPX Series Stall Torque at elevated Ambient Temperatures

Connection

hall diagram

CAD

Drive Compatibility

Motor P/N Cont Stall
Current
(ARMS)		 Peak
Current
(ARMS)		 Voltage Drive Model
Imperial Metric PRO (-CAN) PRO (-CAT) CPP-Universal CPP-EZ
RPX40-125V12 6.6 19.7 12 PRO-A20V80A PRO-A20V80A CPP-A12V80A CPP-A12V48A
RPX40-125V24 3.3 9.8 24 PRO-A08V48B PRO-A08V48B CPP-A06V48A CPP-A06V48A
RPX40-125V48 1.6 4.9 48 PRO-A08V48B PRO-A08V48B CPP-A06V48A CPP-A06V48A
RPX40-250V12 10.9 33.3 12 PRO-A20V80A PRO-A20V80A CPP-A24V80A CPP-A24V48A
RPX40-250V24 5.5 16.7 24 PRO-A20V80A PRO-A20V80A CPP-A12V80A CPP-A12V48A
RPX40-250V48 2.7 8.3 48 PRO-A08V48B PRO-A08V48B CPP-A06V48A CPP-A06V48A
RPX40-325V12 10.2 31.0 12 PRO-A20V80A PRO-A20V80A CPP-A24V80A CPP-A24V48A
RPX40-325V24 5.1 15.5 24 PRO-A20V80A PRO-A20V80A CPP-A12V80A CPP-A12V48A
RPX40-325V48 2.6 7.7 48 PRO-A08V48B PRO-A08V48B CPP-A06V48A CPP-A06V48A
  1. Note1: PRO-A20V80A maximum continuous & peak currents = 14.1Arms & 28.3Arms

ElectroCraft Rapid Delivery Program

Some versions of this product are available via ElectroCraft's Rapid Delivery Program. Lead times for these products are given in working days and stated below. Please note, these lead times may be exceeded during holiday periods or due to unforeseen circumstances. Always contact your local ElectroCraft representative for confirmation of availability.

Rapid delivery products are stocked in locations all over the World. If the product you require is not stocked in your region, you may request accelerated delivery from other areas. Please consult your local representative for more information.

Customers are responsible for all freight charges.

Rapid Delivery to:

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The Americas - View Cart

Part Number Description Add to Cart
RPX40-125V24-100-S 40mm Brushless DC Motor, 24VDC, 6000RPM no-load speed, 398 mNm peak torque, 108 mNm continuous at 4775RPM, hall sensors + 2048 line differential encoder Buy Now
RPX40-250V24-100-S 40mm Brushless DC Motor, 24VDC, 5000RPM no-load speed, 763 mNm peak torque, 155 mNm continuous at 4075RPM, hall sensors + 2048 line differential encoder Buy Now
RPX40-325V24-100-S 40mm Brushless DC Motor, 24VDC, 3600RPM no-load speed, 991 mNm peak torque, 270 mNm continuous at 2950RPM, hall sensors + 2048 line differential encoder Buy Now

Europe, the Middle East and Africa

Part Number Description Typical Lead Time
RPX40-125V24-100-S 40mm Brushless DC Motor, 24VDC, 6000RPM no-load speed, 398 mNm peak torque, 108 mNm continuous at 4775RPM, hall sensors + 2048 line differential encoder 2 days
RPX40-250V24-100-S 40mm Brushless DC Motor, 24VDC, 5000RPM no-load speed, 763 mNm peak torque, 155 mNm continuous at 4075RPM, hall sensors + 2048 line differential encoder 2 days
RPX40-325V24-100-S 40mm Brushless DC Motor, 24VDC, 3600RPM no-load speed, 991 mNm peak torque, 270 mNm continuous at 2950RPM, hall sensors + 2048 line differential encoder 2 days

Asia

Part Number Description Typical Lead Time
RPX40-125V24-100-S 40mm Brushless DC Motor, 24VDC, 6000RPM no-load speed, 398 mNm peak torque, 108 mNm continuous at 4775RPM, hall sensors + 2048 line differential encoder 2 days
RPX40-250V24-100-S 40mm Brushless DC Motor, 24VDC, 5000RPM no-load speed, 763 mNm peak torque, 155 mNm continuous at 4075RPM, hall sensors + 2048 line differential encoder 2 days
RPX40-325V24-100-S 40mm Brushless DC Motor, 24VDC, 3600RPM no-load speed, 991 mNm peak torque, 270 mNm continuous at 2950RPM, hall sensors + 2048 line differential encoder 2 days