KLS-8080I/IPS - High Power Opto-Isolated Sinusoidal Wave Brushless Motor Controller (72V-144V) (200A-700A)

Kelly KLS programmable motor controllers provide efficient, smooth and quiet controls for electric motorcycles, golf carts and go-carts; as well as industrial motor control. KLS controllers are mainly designed to solve noise problems of BLDC motor driving application. Compared to the traditional trapezoidal waveform control technology, this technique based on sinusoidal wave driving technology is to reduce the operation noise and 1/3 switching loss, which well meets the noise reduction and efficiency requirements in the application of DC brushless motors. It uses high power MOSFETs, SVPWM and FOC to achieve efficiencies of up to 99% in most cases. A powerful microprocessor brings in comprehensive and precise control to the controllers. It also allows users to adjust parameters, conduct tests, and obtain diagnostic information quickly and easily.

KLS-8080I works with BLDC motors with hall sensors. KLS-8080IPS can work with BLDC motors with sine/cosine speed sensors.

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Additional information

Weight 12 lbs
ModelVoltage30 Seconds CurrentContinuous CurrentMotor Sensors
KLS72501-8080I72V500A200AHall Sensors
KLS72601-8080I72V600A240AHall Sensors
KLS72701-8080I72V700A280AHall Sensors
KLS96501-8080I96V500A200AHall Sensors
KLS96601-8080I96V600A240AHall Sensors
KLS12201-8080I120V200A80AHall Sensors
KLS12301-8080I120V300A120AHall Sensors
KLS14201-8080I144V200A80AHall Sensors
KLS14301-8080I144V300A120AHall Sensors
KLS14401-8080I144V400A160AHall Sensors
KLS72501-8080IPS72V500A200ASine/Cosine Speed Sensors
KLS72601-8080IPS72V600A240ASine/Cosine Speed Sensors
KLS72701-8080IPS72V700A280ASine/Cosine Speed Sensors
KLS96501-8080IPS96V500A200ASine/Cosine Speed Sensors
KLS96601-8080IPS96V600A240ASine/Cosine Speed Sensors
KLS12201-8080IPS120V200A80ASine/Cosine Speed Sensors
KLS12301-8080IPS120V300A120ASine/Cosine Speed Sensors
KLS14201-8080IPS144V200A80ASine/Cosine Speed Sensors
KLS14301-8080IPS144V300A120ASine/Cosine Speed Sensors
KLS14401-8080IPS144V400A160ASine/Cosine Speed Sensors
Kelly 8080I/IPS - High Power Opto-Isolated Sinusoidal Wave Brushless Motor Controller

KLS8080I/IPS is designed with opto-isolated technology. We specify 8-30V for power supply which must be isolated from main battery pack B+/B-. You may use an isolated DCDC converter or a separate 12V battery for power supply.

General functions:

  • Extended fault detection and protection. Customers can read the error code in PC software or Android Tablet also.
  • Monitoring battery voltage. It will stop driving if the battery voltage is too high and it will progressively cut back motor drive power as battery voltage drops until it cuts out altogether at the preset “Low Battery Voltage” setting.
  • Built-in current loop and over current protection.
  • Configurable motor temperature protection range.
  • Current cutback at low temperature and high temperature to protect battery and controller. The current begins to ramp down at 90℃ case temperature, shutting down at 100℃.
  • The controller keeps monitoring battery recharging voltage during regen braking.
  • Maximum reverse speed and forward speed can be configured between 20% and 100% respectively and separately.
  • A 4pin connector to RS232 port and a Z-TEK USB to RS232 cable allows for configuration, programming and software upgrades using the tablet which must be based on Android OS now. People can do the same things on PC software by using a standard USB to RS232 cable instead.
  • Provision of a +5 volt and +12 volt output to supply various kinds of hall sensors.
  • 5 switch inputs which are activated by connection to 12V. Default to throttle switch, brake switch, reversing switch, and forward switch and Boost switch.
  • 3 analog 0-5V inputs that default to throttle input, Brake analog input and motor temperature input
  • Copy signal of one of sensors.
  • Configurable boost switch. Enables the maximum output power achievable if the switch is turned on. The effect is the same as full throttle position even if you don’t turn throttle at all.
  • 12V brake switch input used different port from motor temperature sensor. You can use both brake switch and motor temperature sensor functions at the same time on the latest version. Pin 25 is 12V brake switch input port. Pin1 is motor temperature sensor input port.
  • Optional joystick throttle. A bi-symmetrical 0-5V signal for both forward and reversing.
  • Configurable motor over-temperature detection and protection with the recommended thermistor KTY84-130/150 or KTY83-122.
  • 3 hall position sensor inputs. Open collector, pull up provided. Sin/Cosin Speed sensors inputs.
  • Brake analog regen mode. This regen mode doesn’t need brake switch to support any more. Only available from software version 0106 or advanced version.
  • Enhanced regen brake function. A novel ABS technique provides powerful and smooth regen. The regen can happen at any speeds until zero speed.
  • Cruise control. Only can be activated in forward direction.
  • KLS-8080I/IPS can support Broadcast type CAN bus function. It is 250Kbps. By default, KLS-8080I/IPS controller includes CAN bus function.
  • Bluetooth function. Required a small Bluetooth converter which needs to be purchased in addition from our website. This small converter is only useful for KLS controller.
  • Can support three speed function on the latest version.


  • Intelligence with powerful microprocessor.
  • Synchronous rectification, ultra-low drop, fast SVPWM and FOC to achieve very high efficiency.
  • Electronic reversing.
  • Voltage monitoring on 3 motor phases, bus, and power supply.
  • Voltage monitoring on voltage source 12V and 5V.
  • Current sense on all 3 motor phases.
  • Current control loop.
  • Hardware over current protection.
  • Hardware over voltage protection.
  • Configurable limit for motor current and battery current.
  • Low EMC.
  • Battery protection: current cutback, warning and shutdown at configurable high and low battery voltage.
  • Rugged aluminum housing for maximum heat dissipation and harsh environment.
  • Rugged high current terminals, and rugged aviation connectors for small signal.
  • Thermal protection: current cut back, warning and shutdown on high temperature.
  • Controller can do auto_Identification angle for different Sine/Cosine Speed sensors. Can adjust the zero-crossing point and signal amplitude to match different Sine/Cosine speed sensors.
  • Configurable high pedal protection: the controller will not work if high throttle is detected at power on.
  • Current multiplication: Take less current from battery, output more current to motor.
  • Easy installation: 3-wire potentiometer will work.
  • Standard PC/Laptop computer to do programming. There is one more choice for customers to program KLS controller. Standard Tablet with Android OS to do programming. Need a Z-TEK USB TO RS232 cable for connecting the controller to App program in Tablet.
  • User program provided. Easy to use. No cost to customers.
  • Support motors with any number of poles.
  • Up to 70,000 electric RPM standard. (Electric RPM = mechanical RPM * motor pole pairs; Motor pole pairs=Motor poles/2).


  • Frequency of Operation: 10 kHz or 20 kHz.
  • Standby Battery Current: < 0.5mA.
  • 5V or 12V Sensor Supply Current: 40mA.
  • Controller supply voltage range: PWR, 8V to 30V for pin7 and pin6 which must be isolated from main battery pack B+/B-.
  • Supply Current, PWR, 30mA Typical.
  • Configurable battery voltage range, B+. Max operating range: 18V to 1.25*Nominal Voltage.
  • Standard Throttle Input: 0-5 Volts (3-wire resistive pot), 1-4 Volts (hall active throttle).
  • Throttle Input: 0-5 Volts. Can use 3-wire pot to produce 0-5V signal.
  • Full Power Operating Temperature Range: 0℃ to 70℃ (MOSFET temperature).
  • Operating Temperature Range: -40℃to 100℃ (MOSFET temperature).
  • Max Battery Current: Configurable.