Hero Electric Senior Design Engineer Interview Questions and Answers

Q1. Basic fucndamemtals
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Q2. GD&T , stack up analysis
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Numberings skills need to be strong

Communication skills

Q1. Vehicle dynamics and aspect
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Q1. What is the main aspects of PSFB converter
Ans. 
PSFB converter is a type of power supply that offers high efficiency and low electromagnetic interference.
• High efficiency due to zero voltage switching

• Low electromagnetic interference

• Commonly used in high power applications such as server power supplies

• Requires careful design to optimize performance
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Q2. Half bridge driver IC functions
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Half bridge driver IC functions include driving high-side and low-side MOSFETs to control power flow in applications like motor control and power inverters.
• Drives high-side and low-side MOSFETs to control power flow

• Used in applications like motor control and power inverters

• Provides protection features like overcurrent and overtemperature detection
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Q3. Leakage inductance in the Magnetic design
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Leakage inductance in magnetic design refers to the inductance that is not coupled to the primary winding of a transformer.
• Leakage inductance is caused by the magnetic field not linking both windings of a transformer fully.

• It can be minimized by using proper winding techniques and insulation materials.

• Leakage inductance can affect the efficiency and performance of a transformer.

• It is important to consider leakage induc...read more
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Q1. How to work bms
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BMS stands for Building Management System, which is used to control and monitor a building's mechanical and electrical equipment.
• Understand the system architecture and components of the BMS

• Configure and program the BMS to meet the specific requirements of the building

• Monitor and troubleshoot the BMS for any issues or malfunctions

• Regularly maintain and update the BMS software and hardware

• Provide training to building ope
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Q2. Bldc motor how to work
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BLDC motor works by using electronic commutation to switch the direction of current flow in the motor windings, creating magnetic fields that rotate the motor shaft.
• BLDC motors use permanent magnets on the rotor and electromagnets on the stator.

• Electronic commutation controls the direction of current flow in the motor windings.

• The magnetic fields created by the current flow interact to rotate the motor shaft.

• BLDC motor...read more
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Q1. Difference between pmsm and bldc motor?
Ans. 
PMSM has sinusoidal back EMF and requires complex control algorithms, while BLDC has trapezoidal back EMF and simpler control.
• PMSM (Permanent Magnet Synchronous Motor) has sinusoidal back EMF, requiring complex control algorithms.

• BLDC (Brushless DC Motor) has trapezoidal back EMF, making control simpler and more efficient.

• PMSM is typically used in high-performance applications like electric vehicles, while BLDC is comm...read more
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Q2. Difference between Lead and Lithium battery?
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Lead batteries are heavier and cheaper but have lower energy density compared to lithium batteries.
• Lead batteries are heavier and cheaper than lithium batteries.

• Lead batteries have lower energy density compared to lithium batteries.

• Lithium batteries have higher energy density and are lighter than lead batteries.

• Lithium batteries have a longer lifespan compared to lead batteries.
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Q1. Whw can you joiin us?
Ans. 
I have a strong background in technical troubleshooting and customer service, making me a valuable addition to your team.
• I have a degree in Mechanical Engineering and 3 years of experience in troubleshooting and repairing industrial equipment.

• I am skilled in diagnosing and resolving technical issues, providing excellent customer service, and working efficiently under pressure.

• I have a proven track record of successfull...read more
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