Hardware Engineer - Motor Controller

Who are we: Raptee.HV is a full-stack electric motorcycle startup with a strong technical foundation. Founded in 2019 by four engineers from Chennai (with backgrounds at Tesla and Wipro), Raptee Energy aims to revolutionize the EV market by offering a high-performance motorcycle alternative to the existing scooter-dominated options. The company is incubated at CIIC & ARAI.

Why Join Us? As a Hardware Engineer, you will own the schematic design, MCU selection, control analysis, and debugging of our PMSM motor controllers . From deriving PI gains mathematically, to designing circuits, to validating MTPA and field-weakening strategies on dyno, your work will directly shape the efficiency, drivability, and reliability of our motorcycles. This role offers a unique chance to bridge theory and practice — combining advanced control mathematics, hardware design, and real-world validation — with your designs powering vehicles on the road. Key Responsibilities Power Electronics & High-Voltage Hardware Design inverter stages, gate driver circuits, protection circuits, and sensing hardware for PMSM controllers. Select and validate semiconductors (MOSFETs, IGBTs, drivers, sensors) with attention to thermal and EMI/EMC constraints. Support EMI/EMC compliance and reliability engineering. Low-Voltage & Schematic-Level Design Create schematics for microcontroller circuits, decoupling, RC filters, and signal conditioning. Define best practices for analog vs digital ground separation, noise mitigation, and mixed-signal design. Provide clean schematic packages for PCB design engineers and review their implementation. Control Systems & Plant Modeling Develop mathematical plant models of inverter–motor systems using Laplace transforms and transfer functions. Perform stability analysis and analytically calculate PI/PID gains before dyno validation. Simulate and validate control loops in MATLAB/Simulink. Advanced PMSM Control Strategies Apply advanced PMSM/IPM control methods such as MTPA, MTPV/field weakening, and deep field weakening . Understand differences in strategy between surface PMSM and interior PMSM . Implement and validate smooth transitions between torque control, MTPA, and flux-weakening regions. Optimize strategies for efficiency, drivability, and thermal limits. Hardware Debugging & Validation Bring up new boards, validate signals, and debug hardware issues across power and low-voltage domains. Diagnose noise, grounding, or signal integrity problems and propose corrective design changes. Validate torque output, efficiency, and stability on dyno setups. System Architecture & MCU Selection Collaborate with software and firmware engineers to select appropriate microcontrollers . Define requirements such as clock speed, memory size, ADC resolution, PWM frequency, and peripheral availability . Decide pin mapping, communication interfaces (CAN, SPI, I2C, UART), and safety features to support system needs. Ensure hardware choices align with control-loop timing and software requirements . Vehicle-Level Perspective Understand how motor controller design affects regen strategies, drive-cycle energy use, and overall vehicle range . Use vehicle-level simulations to align hardware and control choices with efficiency and drivability goals. Collaboration & Documentation Work closely with firmware/software engineers for integrated development. Document schematics, component justifications, control analysis, debugging results, and validation procedures.

What we’re looking for

B.E./B.Tech or M.E./M.Tech in Electrical, Electronics, Power Electronics, or Control Systems Engineering. Strong knowledge of PMSM/IPM motor controller hardware (inverters, gate drivers, sensing, protection). Deep understanding of control theory : Laplace transforms, transfer functions, Bode/Nyquist stability, PI/PID tuning. Practical expertise in advanced PMSM control strategies (MTPA, MTPV, flux weakening, deep field weakening). Experience in schematic-level design of both power and low-voltage circuits. Hands-on experience in hardware debugging and board bring-up . Familiarity with MATLAB/Simulink for plant modeling, control simulation, and vehicle-level analysis . Experience validating controllers on dyno setups. Ability to collaborate on microcontroller selection and requirements definition with software teams. Nice-to-Have Experience with automotive standards (ISO 26262, EMI/EMC). Exposure to state-space or observer-based control methods. Knowledge of thermal design and reliability analysis. Experience with HIL testing or rapid prototyping.

What’s In It for You: Opportunity to work in a fast-paced and dynamic environment. Opportunities for professional advancement as the company undergoes expansion. A culture that fosters collaboration and creativity within the team. Collaborate closely with seasoned experts in the field.