NI Multisim Automotive Applications

Publish Date: Feb 19, 2013 | 5 Ratings | 3.20 out of 5 | Print

Table of Contents

  1. What is NI Multisim for Circuit Design in the Automotive Industry?
  2. Multisim Automotive Added-Value
  3. Customer Success Stories

1. What is NI Multisim for Circuit Design in the Automotive Industry?

NI Multisim is a best-in-class SPICE simulation and rapid PCB layout tool used by automotive designers and test engineers of different focus areas. Multisim Automotive customer base extends from leading car manufacturers worldwide, to multi-national automotive part suppliers, to small and medium enterprises developing car electronics and OEM solutions.

Examples of applications customer are successful in developing using Multisim:

  • Power supplies, current protection circuitry, and different drivers (motor, pump, relay,… etc)
  • Modeling of different sensor signal and the corresponding signal conditioning interfaces (position, speed, pressure, hall effect, and other sensors)
  • Modeling of CAN transceiver electronics and wiring
  • Audio electronics, lighting application, and car infotainment

Below is a simulation of a Hall Effect sensor circuit in Multisim. Drag and drop the image into your Multisim workspace to load the design. Learn more about this design.


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2. Multisim Automotive Added-Value

Powerful Library of Popular Automotive Components from Semiconductor Manufacturers

Multisim’s component libraries are validated by NI R&D engineers who work directly with leading semiconductor manufacturers on obtaining precise models yielding accurate simulation results. Large libraries of automotive parts have been included in the recent releases of Multisim:

  • Switched Mode Power Supply (SMPS) controllers from ON Semiconductor
  • Protection diodes and zeners from NXP semiconductor
  • Large library of operational amplifiers from Analog Devices

The below circuit is based on the ON Semiconductor model of integrated circuit NCP1030, which is a highly integrated power switch circuit. The part symbol, model, and footprint are available in Multisim. The design background could be found in ON Semiconductor application note AND8119/D (drag and drop circuit in your Multisim workspace).

In Multisim advanced analyses could be performed over this circuit to help determining:

  • The fundamental circuit transient response
  • The amount of harmonic distortion caused by the switching frequency
  • Power supply faults and in-rush currents
  • Different load configuration and load effect on performance
  • Transformer leakages and core magnetization

Multisim and LabVIEW Co-simulation for Power Inverter Design

NI investment in power electronics design, specifically power inverter designs, is offering a complete design solution that includes:

  • Accurate system-level simulation of analog plants in Multisim and FPGA-based controllers in NI LabVIEW
  • Rapid prototyping of FPGA and Real Time code with the NI RIO platforms
  • Ready-to-deploy commercial solution with the NI General Purpose Inverter Controller

Learn more about Multisim and LabVIEW co-simulation of power inverters

Rapid PCB Prototyping

This design demonstrates how to build a custom PCB with sensor and signal conditioning functionalities as an expansion of the NI Compact RIO platform. The design showcases how the powerful simulation tools of Multisim helped validate the circuit while Ultiboard rapid prototyping helped accomplishing layout tasks quickly and easily.

Another advantage of this design approach is that there is no need to define a custom analog to digital converter (ADC) usually needed for fully customized C-series modules. Instead quick prototyping is leveraged with Commercial Off-The-Shelf (COTS) modules and Multisim and Ultiboard simulation and layout.

Learn more about this design and download simulation and layout files


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3. Customer Success Stories

Complete Prototyping of a Formula Race Car by the University of Manchester

Multisim and LabVIEW software with NI CompactRIO programmable automation controller (PAC) were used to simulate the vehicle, collect data, and use the data to create custom alarms. The loom simulation in Multisim ensured that the system functions in accordance with safety rules by checking the operation of various safety cut-outs. Current flows could be simulated to estimate battery performance and optimize PCBs. By simulating prior to buying any components or PCBs, Multisim saved time and unnecessary costs. Read the full case study


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