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.