www.hofer.de

hofer powertrain GmbH

V. Hartmann 2013

Your Partner for Energy-Efficient

Drive Technology

A hofer AG Company

72622 Nürtingen, Ohmstrasse 15

E-Mail: info@hofer.de

www.hofer.de

hofer power electronics Overview hLE300TF06 product - line

www.hofer.de V. Hartmann 2013

L1

L2

L3

T2D1

D2T1

+

T1

D1

T2

D2

T3

D3

T4

D4

T5

D5

T6

D6

iL1

iL3

iL2

t

thigh

thigh

tlow

UZK

+

UZK

-

u12

UZK

iL1

iL2

iL3

u23

u31

D2

tlow

2

tlow

2

TPWM

D12

thigh

2

TPWM

Functional requirements Safety requirements HW / SW ISO26262 conform solution

Functional safety inside:

Development process related to ISO26262

ASIL C + D conform HW and SW architecture

EM control inside: Field oriented control for all kind of 3 phase

• Induction electric machines and

• Permanent excited synchronuos electric machines

hofer offers automotive qualified power inverter product hLE300TF06

ready for use in safety relevant series production and turn key projects

hofer power electronics platform features:

• automotive µC platform

• automotive SW/FW development process

• fail safe operation (limitation concept & diagnostic)

• torque safety by means of Safety observer I and II

• redundant safety processor included (FPGA)

• ready to use resolver and speed sensor interface

• HW and SW diagnostic for safety measures available

automotive power inverter - ISO26262 certified

Outstanding performance parameters

• Up to 450V DC link voltage

• 300Arms continuous AC current

• 500Arms for 30s AC peak current

• -40°C up to +75°C cooling temperature range

optional

• 850V DC link voltage engineering samples available

www.hofer.de V. Hartmann 2013

Electrified powertrain system integration - examples

As system integrator, hofer develops customer suited electrified drivetrain

solutions for small series volumes and niches with high technical requirements

*: Peak power dependent on voltage level; continuous power up to 80kW by use of water cooling

PM = Permanent exited Motor (rare earth magnets)

hLE300TF06

SAE1 heavy duty parallel hybrid

CV / Off highway

EM torque range: 1000 – 1200Nm max speed range: 3000 – 3500rpm EM peak power: 100 – 150kW* EM efficiency: > 96% EM weight active: <60kg Axial displacement: <180mm

EM torque range: 250 – 320Nm max speed range: 12000 – 14000rpm EM peak power: 120 – 150kW* EM efficiency: > 94% EM weight active: <50kg

*: Peak power dependent on voltage level; continuous power up to 70kW by use of water and active rotor cooling

IM = Induction Motor (die cast squirrel cage rotor)

Super Sportscar

Electric axle high performance

www.hofer.de V. Hartmann 2013

Backup

www.hofer.de V. Hartmann 2013

www.hofer.de V. Hartmann 2013

FMEDA

2500 parts

150 safety relevant

134 non

safety relevant

284 subassemblies

hofer Group – Overview Competences and Services

Series production – hofer power inverter and EM control

ISO26262 ASIL C ASIL D

SPFM [%] ≥ 97 99.1 ≥ 99

LFM [%] ≥ 80 89.4 ≥ 90

1FIT = 10-9/h

PFH [FIT] ≤ 50 5.2 ≤ 10

Failure mode

Birolini

Failure rate

SN29500

already

without

any

FTA!