What skills do electronic engineers mainly need?

Technician does not require a lot of technical knowledge. He is a management position, not a technical position

Technical position is engineer, as follows

1. Become an electronic engineer Basic requirements:

1. Educational qualifications

First of all, academic qualifications are a stepping stone. Nowadays, many units recruit inexperienced technical personnel, such as R&D assistant engineers, with at least a bachelor's degree. There is actually no necessary connection between academic qualifications and ability. Among the engineers I know, there are many masters with low academic qualifications, who are even more skilled than undergraduates and graduate students. But for now, this is the reality.

2. Have strong curiosity

This is a necessary condition for becoming a master. He likes new things, likes to inquire deeply about problems, and takes pleasure in delving into them. The kind of people who muddle along, perfunctory, and just regard their work as their livelihood cannot even become a journeyman, let alone a master. A curious person can work all night to solve a problem and think about the solution while lying in bed.

3. Be cautious and meticulous in doing things, and consider the problem comprehensively

Do not be careless in technical work, otherwise there will be many problems and endless troubles. It may even have a significant impact on production and product quality, and cause significant economic losses to the company. Careless people can only serve as assistants.

4. Do things as a human being, think twice before acting

In daily work, be modest and eager to learn, good at summarizing and accumulating, love to help others, do not put on airs, be serious and responsible, and do not Fear of power.

2. How many things does an electronic engineer need to be responsible for?

1. Accept the power supply design requirements. Evaluate costs and determine feasible solutions.

2. According to customer quotation. Feasible circuit given approximate component costs and production costs.

3. Conceive the schematic diagram. Determine the selected power tube and transformer, and the most stable, simplest and most convenient principle solution to produce.

4. Design the PCB according to the schematic diagram, sample requirements or shell requirements given by the customer.

5. According to the schematic diagram, assemble appropriate components and adjust electrical parameters. Make the product work properly under minimum requirements.

6. Load test, with the power reaching 80%, check the output waveform, voltage requirements, electromagnetic properties, power tube temperature, voltage stability, and conversion efficiency. In this process, appropriate parameter adjustments are made to the electronic components.

7. Strengthen testing. That is, tests such as overload, short circuit, low voltage, overvoltage, strong temperature, and shock resistance.

8. Determine the accurate parameters of the schematic diagram based on the sample, determine the orientation map and material drawing, and send them to the production department, warehouse manager, and merchandiser to produce the sample in small batches.

9. Conduct strict testing on the sample. If all performances are OK, the salesperson will send it to the customer for evaluation. OK, ready for mass production. WeChat public account: Shenzhen LED Chamber of Commerce

10. In future production, the project will be tracked and improved, and shipped to customers in the shortest time and with the best quality.

3. What software should electronic engineers learn?

1. Office series

2. PCB drawing software, such as AD, PADS, Protel99se

3. Engineering calculation software, such as Mathcad.

4. Mechanical software, such as AutoCad.

4. What instruments do electronic engineers need to be able to use?

Multimeter, oscilloscope, soldering iron, electronic load, voltage regulator, bridge, voltage withstand meter, surge generator, impact voltage withstand meter, vibration meter, high and low temperature chamber, conductivity meter, thermal imaging Instruments, automatic testers, EFT group pulse generators, etc., and are familiar with the performance of wave soldering, placement machines, plug-in machines, and automatic welding machines.

5. What knowledge should electronic engineers know?

1. English, analog electricity, digital electricity, advanced mathematics, electromagnetics, circuit analysis, etc. For example, you also need to know some principles of automatic control, software programming, data structure, basic chemistry, etc. You also need to know some structure, basic chemistry, etc.

2. Be familiar with all the components that make up the switching power supply, including resistors, capacitors, diodes, transistors, inductors, thermal, pressure sensitive, field effect tubes, transformers, fuses, relays, switches, terminals , wires, integrated circuits, etc. The combination of various components is our basic circuit: amplification, filtering, isolation, signal source, voltage stabilization, comparison, current amplification, voltage amplification and other permanent circuits. Of course, I also need to add some independent circuits that I came up with. Can understand the manuals given by the manufacturer of each component, such as the chip datesheet.

6. What professional indicators or standards should electronic engineers understand?

Understand and be able to test various indicators and standards related to power supply: absolute voltage regulation coefficient, grid regulation rate, voltage stability, load regulation rate, output resistance, also called equivalent internal resistance or internal resistance, maximum Ripple voltage, ripple coefficient, ripple voltage suppression ratio, surge current, overcurrent protection, overvoltage protection, output undervoltage protection, overheating protection, temperature drift and temperature coefficient, response time, distortion, noise, input noise, wave Surge, electrostatic noise, stability, electrical safety requirements, power supply safety requirements, leakage current measurement, insulation resistance test, printed circuit board requirements, such as materials, insulation of transformer, dielectric strength of transformer, insulation resistance of transformer, transformer Humidity resistance, VDE requirements for transformer temperature characteristics, UL, CSA, IEC, FCC, CCC, CQC, CE, conduction, radiation, low temperature, high temperature, constant humidity and heat, alternating humidity and heat, impact (impact and collision), vibration, constant Acceleration, (WeChat official account: Shenzhen LED Chamber of Commerce), storage, mold growth, corrosive atmosphere (such as salt spray), sand and dust, air pressure (high or low pressure), temperature changes, flammability, sealing, water, radiation (sun or core), soldering, terminal strength, noise, etc.

7. What technologies should electronic engineers master?

Various topologies of switching power supplies: RCC, buck, boost, buckboost, flyback, forward, push-pull, half-bridge, full-bridge

Active PFC topology, Analysis, control and design

Topology and steady-state analysis of DC-DC power converter

Power stage parameter design of switching power supply

Control and control of switching power supply Dynamic analysis

Small signal analysis and design of switching power supply

Large signal analysis and design of switching power supply

EMI analysis and design of switching power supply

Thermal analysis and design of switching power supply

Tolerance analysis and design of switching power supply

Various protection technologies of switching power supply

Synchronization of switching power supply Rectification technology

Module current sharing control technology of switching power supply

Transformer winding

Optimization of power stage parameters

Loop parameters Optimization

Optimization of auxiliary power supply parameters

Optimization of various protection circuits in the power supply

Optimization of EMI filter circuit

Power supply Optimization of the internal thermal environment

Optimization of other functional circuits of the power supply (such as current sharing, synchronization, hot plugging, remote compensation, etc.)

Optimization of PCB Layout, etc.

The trade-off between steady-state performance and dynamic performance

The trade-off between power density and reliability

The trade-off between small-signal performance and large-signal performance

Design trade-offs at high and low temperatures

Trade-offs between electrical and thermal performance

Design trade-offs in key components