DC servo motor
Kinco SMC Series Low-Voltage DC Servo Motors
Low-voltage (24-48 VDC) brushless servo motors with a 12-slot/10-pole low-cogging design, IP65 and a choice of optical or magnetic, incremental or absolute encoders. Matched to Kinco FD1 and OD drives for battery-powered and mobile machines.
Key specifications
| Ingress protection | IP65 |
|---|---|
| Power | 50–3,000 W |
| Frame sizes | 40, 60, 80, 130 mm |
| Supply | 48 VDC (page); 24 / 36 / 48 VDC curves in catalogue |
| Feedback | Optical or magnetoelectric encoder, Incremental 2500 P/R, Single-turn or multi-turn absolute |
| Inertia | Small (S) and medium (D) inertia variants |
Series ranges as published; individual models vary. The full datasheet, drawings and CAD models are available on request.
Options
- Optional brake
- Optional oil seal
- Insulation class F
- Energy efficiency class 2
Typical applications
What a DC servo motor is
A DC servo motor, in current usage, is usually a low-voltage brushless permanent-magnet motor designed to run from a DC bus, typically 24 to 96 V, under closed-loop servo control. Electronically it works like an AC servo, with a three-phase stator commutated by the drive and encoder or Hall feedback on the shaft. The lower voltage means higher current for the same power, but suits battery-powered and safety-extra-low-voltage machines. Small precision brushless servomotors also fall into this group.
When engineers choose a DC servo motor
Choose a low-voltage DC servo for mobile robots, AGVs, battery equipment, medical devices and compact machines where mains voltage is impractical or unsafe. It allows simple power distribution and safe access. The trade-offs are current and power range: high current means thicker cables and higher losses, so power is typically limited to a few kilowatts. For mains-powered machines above that, an AC servo is usually simpler.
How to specify the Kinco SMC Series Low-Voltage DC Servo Motors
Send these with your enquiry and an engineer can confirm the right SMC Series Low-Voltage DC Servo Motors variant:
- Bus voltage (V DC) and battery range
- Continuous and peak torque (Nm)
- Rated and maximum speed (rpm)
- Continuous and peak current (A)
- Feedback type and resolution
- Brake, IP code and frame size (mm)
- Drive and network interface
Common mistakes to avoid
- Sizing at nominal battery voltage without checking the low-charge end
- Undersizing cables for the higher current
- Ignoring regenerative energy into a battery or supply
- Mixing motor and drive feedback types that are not compatible
Kinco SMC Series Low-Voltage DC Servo Motors: frequently asked questions
What is the Kinco SMC Series Low-Voltage DC Servo Motors?
Low-voltage (24-48 VDC) brushless servo motors with a 12-slot/10-pole low-cogging design, IP65 and a choice of optical or magnetic, incremental or absolute encoders. Matched to Kinco FD1 and OD drives for battery-powered and mobile machines. Published series figures include power 50 W, power 3,000 W. It is available through our supply network, and our engineers can confirm the right variant for your application.
Who makes the Kinco SMC Series Low-Voltage DC Servo Motors?
The Kinco SMC Series Low-Voltage DC Servo Motors is made by Kinco (Kinco Automation) available through our supply network. Send us your requirement for pricing, lead time, datasheets and CAD.
What is the power of the Kinco SMC Series Low-Voltage DC Servo Motors?
The published series minimum power is 50 W. Individual models and sizes in the SMC Series Low-Voltage DC Servo Motors range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
What is the difference between an AC servo and a DC servo motor?
Both are typically brushless permanent-magnet motors under closed-loop control. The main difference is the supply: AC servos are wound for drives fed from mains voltage, while DC servos are wound for low-voltage DC buses. DC servos suit battery and low-voltage machines; AC servos suit higher-power mains machines.
How does battery voltage affect a DC servo motor?
Motor speed is roughly proportional to available voltage, so as a battery discharges the top speed falls. Size the motor at the lowest working battery voltage. Also allow for regenerative energy during braking, which raises bus voltage and must be absorbed by the battery or a braking circuit.
Further reading: How to select a servo motor · How to select a dc motor · Servo and stepper motors
Often compared with
Engineers specifying this series often compare it with:
Other dc servo motor series
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