CubeMars TW-80A-12S (2 pcs/set)

The TW-80A-12S is a high-current electronic speed controller (ESC) that CubeMars developed for its underwater thrusters. It is recommended for the more powerful thrusters in the range, such as the SW17, DW20 and DW25. Each package holds two ESCs, so port and starboard thrusters spinning CW and CCW can be driven at the same time for balanced propulsion. It runs on 6S to 12S LiPo or Li-ion batteries and its fully sealed housing is rated IP67.

Key features

• High current capacity. According to the product specification, it delivers 40 A continuous and 90 A peak for less than 10 seconds with adequate heat dissipation.
• Sealed waterproof design. The fully sealed, pressure-resistant housing provides stable operation under water and resistance to seawater corrosion.
• Jerk-free startup and direction change. CubeMars' proprietary algorithm starts the motor smoothly and switches between forward and reverse instantly without hesitation.
• Multiple protections. Overcurrent, overvoltage, motor stall and throttle signal loss are detected in real time, which improves the reliability of the propulsion system.
• Heavy-gauge wiring. To suit the higher current, power and motor wires are 12 AWG, compared with 14 AWG on the TW-40A-12S.

Applications

Typical applications include medium and large ROVs and AUVs with SW17, DW20 or DW25 thrusters, unmanned surface vehicles (USVs), electric surfboards and high-power underwater propulsion systems.

Is it enough for your project?

Your thruster decides. CubeMars recommends the TW-80A-12S for the SW17, DW20 and DW25. For smaller thrusters such as the SW7, SW12, DW10 and DW15, the lighter and smaller TW-40A-12S is enough. Since each package holds two ESCs, a vehicle with four thrusters needs two packages.

The throttle signal range is 1000 to 2000 µs, the motor stops at the 1500 µs midpoint and both directions of rotation are supported. Signal frequency is 50 to 400 Hz. Operating temperature is -20 °C to 65 °C. A single ESC measures 83 x 35 x 22.8 mm and weighs 149.33 g.

How it compares to similar models

• TW-40A-12S. 25 A continuous and 45 A peak with the same 6S to 12S input. It measures 78 x 30 x 19.9 mm, weighs 90.33 g and is recommended for the SW7, SW12, DW10 and DW15.
• ESC in the W30 kit. The W30 ESC-6S-45A supplied with the W30 thruster kit runs on 4S to 6S batteries and delivers 45 A continuous. The TW-80A-12S is designed for up to 12S and much higher current.

Frequently asked questions

How many ESCs are in a set?

Two. Each set contains two TW-80A-12S units, so two thrusters can be driven at the same time.

How is it cooled?

The user manual states that the ESC must be used under water and kept well cooled. ESC temperature can be read in real time over the serial port. According to the manual, below 90 °C is safe, 90 to 110 °C indicates poor cooling or excessive load, and above 110 °C is unsafe.

What data can be read over the serial port?

Supply voltage, motor speed, motor current and ESC temperature are read over a 3-wire UART at 38400 bps. A general-purpose USB serial module such as the CP2102 can be used for the connection.

What happens if the throttle signal is lost?

According to the manual, if no signal arrives for 200 ms the output power is reduced gradually. This prevents the vehicle from running away at full power.

In the box

• TW-80A-12S underwater ESC x2
• Certificate of conformity

Box size 140 x 137 x 77 mm.

Related products

This ESC is used with the SW17, DW20 and DW25 underwater thrusters. Our team can support you with battery, control and vehicle integration.

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