CubeMars G35 KV100

The G35 KV100 is a brushless motor that CubeMars designed for gimbal and radar applications, aiming at high torque density at low speed. The manufacturer describes it as an inrunner. The 90 g motor runs on 16 V and delivers 0.15 Nm rated and 0.46 Nm peak torque. It has no driver board and is used with an external FOC driver.

Key features

• Large center hole. Cables can pass through the large bore in the housing, and an electrical slip ring can be integrated easily.
• Light, low inertia rotor. Rotor inertia is 61 g·cm², so it responds quickly to small correction moves.
• Speed and position control. It is driven with FOC and supports speed and position control modes.
• Low cogging torque. The manufacturer states that the G series runs with low cogging and low energy consumption.
• Waterproof and dustproof design. The product page states this without giving a protection rating.

Applications

Typical applications include light camera gimbals, handheld stabilizers, aerial photography gimbals, rotating radar heads and autonomous driving sensor modules.

Is it enough for your project?

The G35 KV100 delivers 0.15 Nm continuous and 0.46 Nm peak torque. On a gimbal motor the torque demand is mostly set by how far the center of gravity of the load sits from the axis. For example, a 0.5 kg camera whose center of gravity is 2 cm off the axis needs about 0.1 Nm of static torque (0.5 × 9.81 × 0.02). That stays within the motor's rated torque, and a well balanced gimbal has a much smaller offset.

At 16 V the no-load speed is 1320 rpm and the rated speed is 815 rpm. Rated current is 1.3 A, peak current is 4 A and the torque constant is 0.115 Nm/A. For a heavier payload the G40 KV70 from the same series may be a better fit.

How it compares to similar models

• GL35 KV100. The electrical table of this GL model with the same diameter matches the G35 (0.15 Nm rated, 0.46 Nm peak, 90 g). The GL35 page also gives a size of Ø41.8 × 21 mm, a 6 mm bore, IP45 protection and AlexMos gimbal controller compatibility. Its table lists Kv as 82.5 rpm/V.
• G40 KV70. At the same 16 V it gives 0.25 Nm rated and 0.5 Nm peak torque and weighs 107 g.
• GL30 KV290. A smaller 41 g model running on 12 V, with 0.08 Nm rated torque and 3060 rpm no-load speed.

Frequently asked questions

Is a driver included?

No. The product page lists the driver board option as "no". The motor is used with an external FOC gimbal driver.

What is the difference between the G35 and the GL35?

The electrical figures on both pages are the same. The GL35 page states IP45 protection, the motor size and a packing list. The G35 page gives no dimensions and mentions water and dust resistance without a rating. Check the 2D drawing PDF for mounting dimensions.

Can a slip ring be fitted?

Yes. The large center hole is designed for slip ring integration and cable routing.

Which control modes does it support?

Speed and position control. The drive method is FOC.

In the box

• G35 KV100 gimbal motor (no driver board)

The manufacturer does not publish a detailed packing list or box size on the G35 page. Ask our team about cables and mounting parts before ordering.

Related products

Our team can help you choose a driver, encoder and mounting solution.

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